Maharashtra Board Class 12 Geography Notes Chapter 3 Human Settlements and Land Use 

By going through these Maharashtra State Board Class 12 Geography Notes Chapter 3 Human Settlements and Land Use students can recall all the concepts quickly.

Maharashtra State Board Class 12 Geography Notes Chapter 3 Human Settlements and Land Use

→ Man being a social animal, likes living in groups.

→ Due to social bonding and social needs many people come together and construct houses, which is known as settlement.

→ Development of settlement have co-relation between man and environment.

→ Type and spacing of settlements depend upon many physical factors like relief, soil, climate, drainage, groundwater level etc.

→ Social factors, sometimes are responsible for fragmentation of settlements.

Maharashtra State Board Class 12 Geography Notes Chapter 3 Human Settlements and Land Use 

Types of Settlement:

→ Settlements vary in their size and types ranging from hamlets to metropolitan city.
Maharashtra State Board Class 12 Geography Notes Chapter 3 Human Settlements and Land Use  1

→ Type of settlement refers to some common features of the settlement.

→ Pattern of settlements refers to regular form in which series of things occur.

→ The term settlement pattern is strictly applied to the spatial arrangement or distribution of settlement within the given area.

→ On the basis of functions, there are two types of settlement – rural and urban.

→ Cities can be divided on the basis of their function.

→ Some cities specialise in certain functions, activities, products or services.

→ On the basis of specialisation of some important functions, Indian cities can be classified as follows:
Pimpri – Chinchwad as industrial town, Khadki as cantonment town, Pune as educational centre and Kolhapur, Pandharpur as religious town etc.

→ As town becomes city and city becomes metro cities, lots of changes can be seen in them in their form, land uses and structure.

→ As cities grow in their size, there is change in their skyline.

Maharashtra State Board Class 12 Geography Notes Chapter 3 Human Settlements and Land Use 

Land Use Classification:

→ Land use in rural areas is different from urban areas.

Land use and Landcover:

→ Land cover describes the physical surface covering the land like forest, water, sand, ice, rocks, etc.

→ Land use describes the use of the land; use might be recreational, but land cover might be forest or vegetation.

→ Land cover can be determined by analysis of satellite imagery, but the land use cannot be determined from the satellite imagery.

Urban-Rural Fringe:

→ The area between urban and rural area is called urban-rural fringe. It has both the urban and rural characteristics.

→ It is a transition zone between urban and rural area.

→ People from this area daily travel to central area for their work.

→ Here, we have a mixture of rural and urban land use.

→ The city and the surrounding areas consist of two administrative areas – Municipal Councils and Gram Panchayats.

→ Smaller municipal towns lose their identity, though they are geographical part of the city.

→ Town far from the main city maintain its distinct identity and have problems relating to the urban amenities and transportation.

→ The quality of available services is generally inferior.

→ Agricultural land may have been converted to residential or industrial areas or entire area may be rural.

→ Beyond urban fringe, there is a rural fringe. Rural fringe consists of only villages partly affected by the urbanisation.

Maharashtra State Board Class 12 Geography Notes Chapter 3 Human Settlements and Land Use 

Suburbs:

→ Outside metropolitan cities, there might be small towns or number of well-developed cities or towns. Such cities or towns are suburbs of Mumbai.

→ Andheri, Goregaon, Bhandup, Mulund, Thane, Kalyan etc., are suburbs of Mumbai.

→ All these suburbs developed as a result of the growth and development of Mumbai.

Maharashtra Board Class 12 Geography Notes Chapter 2 Population Part 2

By going through these Maharashtra State Board Class 12 Geography Notes Chapter 2 Population Part 2 students can recall all the concepts quickly.

Maharashtra State Board Class 12 Geography Notes Chapter 2 Population Part 2

→ The population is considered a human resource. Its physical and intellectual characteristics affect the development of any region/country.

→ Economic activities develop only with reference to human resources. In the absence of proper use of human resources, other resources are not developed effectively.

→ While studying population composition, we study, age structure, sex, literacy, education, and occupational structure.

Population Composition:

Age Structure

→ Age structure refers to the number of people in different age groups such as infants, children, teenagers, young, adult and old people.

→ Share of each age group in population varies from country to country.

→ Age structure of population can be studied with the help of population pyramid.

→ While drawing population pyramid, age group is taken on Y-axis in the centre and on X-axis population or percentage of population in different age group. On left side of graph is male population and right-side female population.

→ The base of the graph shows children population and apex shows old population.

→ Population in the age group 15-59 years indicate group of working population i.e., economically active population.

→ Population in the age group 0-15 years indicate dependent population or economically inactive population.

→ Population in the age group above 60 years, indicates greater expenditure on medical and health facilities since population in this age group is economically dependent.

Maharashtra State Board Class 12 Geography Notes Chapter 2 Population Part 2

Types of population pyramid

→ Expansive – Broad base with tapering top. This shows high birth rate and high death rates.

→ Constructive – This pyramid has narrower base and broader apex. It indicates lower percentages of younger population and more elderly population. It also shows lower birth rates and lower death rates.

→ Stationary – Population in almost all age groups is same. Very low birth and death rates. There is hardly any population growth.

Sex Composition:

→ Population pyramid gives us idea about number of men and women in different age groups.

→ The ratio between number of men and women in population is called sex ratio.
Sex Ratio = \(\frac{\text { Total Female Population }}{\text { Total Male Population }}\) ×1000

→ The sex ratio gives us important information about the status of women in a country.

→ Average sex ratio of the world population is 990 females per 1000 males.

→ Countries like Latvia, Estonia, Russia and Ukraine have the highest sex ratio in the world. (1162 females per 1000 males)

→ On the other hand, in Saudi Arabia, there are 667 females per 1000 males.

Maharashtra State Board Class 12 Geography Notes Chapter 2 Population Part 2

Demographic Dividend:

→ The growth in an economy as a result of a change in the age structure of a country’s population is known as Demographic Dividend.

→ The change in demographic dividend comes because of a decline in birth and death rates.

→ As birth rate decreases, the number of young dependent population decreases.

→ Economic productivity of a country depends upon the ratio between working and dependant (non-working) population.

→ Higher the ratio, higher is the contribution of working population in the economy.

→ With fewer people to support and more people working, economy’s resources are invested in other areas to accelerate a country’s economic development.

→ Per capita income increases.

→ Demographic dividend depends on the proper implementation of policies in the areas such as education, health, research, etc.

→ It also depends on the level of schooling, employment, frequency of childbearing, economic policy on tax incentives, health, pension, and retirement policies.

Literacy and Education

→ An important indicator of socio-economic development is the proportion of literate population of a country.

→ The standard of living, social status of females, education facilities, government policies reveal socio-economic development of a country.

→ Population above 7 years of age, who can read, write and have the ability to do simple arithmetic calculations with understanding is considered as a literate person in India.

Maharashtra State Board Class 12 Geography Notes Chapter 2 Population Part 2

Occupational Structure:

→ Population of men and women in the age group 15-59 years are considered as working population.

→ Working population take part in primary, secondary, tertiary and quaternary occupations.

Maharashtra State Board Class 12 Geography Notes Chapter 2 Population Part 2 1

 

Rural and Urban Composition:

→ On the basis of residence, population is divided into Rural and Urban.

→ Lifestyles of people living in rural and urban areas is different, which is based upon their livelihood and social conditions.

→ Age and sex composition, occupational structure, density and level of economic development are different in rural and urban areas.

→ The areas in which very large proportion of population engaged in primary occupations are considered as rural.

→ The areas in which large proportion and working population engaged other than primary occupations are considered as urban.

Migration:

→ Movement of people from one place to another, from one country to another, for lesser or longer period or permanently is called migration.

→ Migration also can be voluntary or non-voluntary.

→ Migration changes density patterns and structure of population in both donor as well as recipient region.

Maharashtra State Board Class 12 Geography Notes Chapter 2 Population Part 2 2

 

Maharashtra State Board Class 12 Geography Notes Chapter 2 Population Part 2

Impact of migration on population :
Donor region:

→ Out migration from donor region causes no utilization of existing facilities/services like housing, water supply, transportation, health facilities, education, recreation etc.

→ Expenditure incurred to develop these facilities goes to waste.

→ Age and sex structure changes tremendously. For example, in Kerala, sex ratio of 1,084 female per 1000 male population in working-age group.

Recipient regions

  • Recipient region experiences tremendous pressure on the available facilities.
  • In this region housing, water supply, transportation, medical, education facilities are becoming insufficient due to increasing population.
  • Agricultural land is converted into non – agricultural activities, such as housing.
  • Land prices increase tremendously. Lack of housing leads to the development of slums.
  • There is a shortage of public services, increased economic inequality and crime rate.
  • There will be unfavourable sex ratio e.g., Mumbai 832 and Pune 948.
  • Working-age population higher than non-working age group population.

Maharashtra Board Class 12 Geography Notes Chapter 1 Population Part 1

By going through these Maharashtra State Board Class 12 Geography Notes Chapter 1 Population Part 1 students can recall all the concepts quickly.

Maharashtra State Board 12th Geography Notes Chapter 1 Population Part 1

→ Population Geography is a branch of Human Geography.

→ In this branch, we study quantitative and qualitative composition of population, how population influences the economy and development and much more.

→ The distribution of population in the world is uneven.

→ Asia has 30% landmass and supports 60% of the world’s population.

→ Number of people living in a unit area is called density of population.

→ Density of population = \(\frac{\text { Total population }}{\text { Total area (sq. km) }}\)

Maharashtra State Board Class 12 Geography Notes Chapter 1 Population Part 1 1

Maharashtra State Board Class 12 Geography Notes Chapter 1 Population Part 1

Components of population change:

→ People from one region differ from another region. They can be distinguished from one another on the basis of age, sex, place of residence, occupation and life expectancy.
Population growth :

→ Population growth is the change in number of inhabitants of a territory during specific period of time.

→ Growth of population can be expressed either in terms of absolute number or in percentage.

→ Change of population is an economic indicator of development and social upliftment.

→ Birth rate (BR), Death rate (DR) and Migration are three components of change of population.

Crude birth rate:

Number of live births in a year per thousand population is known as crude birth rate (CBR).
CBR = \(\frac{\text { Total number of live births in a year }}{\text { Total population in that year }}\) × 1000

Crude death rate

→ Number of deaths in particular year per 1000 population is known as crude death rate.
CDR =\(\frac{\text { Total number of deaths in a year }}{\text { Total population in that year }}\) × 1000

→ Population growth in any region occurs not only by increasing birth rate but also because of decreasing death rate

Maharashtra State Board Class 12 Geography Notes Chapter 1 Population Part 1

The Theory of Demographic Transition:

→ No country experiences the same rate of growth or decline of population.

→ Population growth or decline changes with the economic development, tendencies of birth rate and death rate.

→ The theory of demographic transition is based on the population trends of a country with time.

→ Any country passes through different stages of population growth.

Stages of Population Growth :

Stage 1 High stationary stage :

  • High birth and death rates
  • Stable population
  • Poor financial position
  • People engage in primary activities like agriculture
  • Limited educational opportunities
  • Big families
  • Poor science and technological development
  • Poor sanitation facilities, malnutrition and high death rate.

Stage 2 Early expanding stage

  • Development of medical and health care services
  • Control and combat diseases
  • Reduction in mortality rate
  • Constant birth rates
  • Rapidly growing population
  • Efforts to control population
  • Increase in agricultural and industrial production.

Stage 3 Late expanding stage

  • Decreasing death rates
  • Decreasing birth rates
  • Reduction in population
  • Income of the people is slightly above subsistence level
  • Slight increase in the standard of living hence, decreasing poverty
  • Rise in technological growth
  • Expansion of secondary and tertiary activities
  • Increased education facilities, awareness of family planning

Stage 4 Low stationary stage

  • Decrease in birth rate
  • High standard of living
  • Improved economic condition of the country
  • Improved economic status of the people
  • Increased engagement in secondary and tertiary activities
  • Better medical facilitates, hence, low death rates
  • Epidemics under control
  • Health-conscious

Stage 5 Declining stage

  • Equal birth rate and death rate
  • Minimum population growth and negative in some countries
  • Reduced population due to higher mortality
  • Percentage of children is lower than elders
  • Most of the country’s income comes from tertiary activities
  • Best quality education and health facilities
  • Healthy environment and pleasant life

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 23 Infectious Diseases and how to Prevent them

Balbharti Maharashtra State Board Class 5 Environmental Studies Solutions Chapter 23 Infectious Diseases and how to Prevent them Notes, Textbook Exercise Important Questions and Answers.

Maharashtra State Board Class 5 EVS Solutions Part 1 Chapter 23 Infectious Diseases and how to Prevent them

5th Std EVS 1 Digest Chapter 23 Infectious Diseases and how to Prevent them Textbook Questions and Answers

1. What’s the solution?

Question 1.
You are hungry, but the food has been left uncovered.
Answer:
Heating kills all the disease germs present in the food. So if food is uncovered then one should heat (warm) the food and then eat it when hungry. Eating warm food is always good for health.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 23 Infectious Diseases and how to Prevent them

2. Use your brain power!

Question 1.
Which method of preventing the breeding of mosquitoes will you recommend for your surroundings – not allowing water to stagnate or spraying insecticides on the water? Why?
Answer:
First of all it is better not to allow water to stagnate. Hence I would recommend this method for preventing breeding of mosquitoes. However if there are nullahs or gutters in the surrounding area then spraying insecticide on water will be recommended to kill the mosquito larvae growing in water. Therefore both the methods need to be applied sometimes.

3. Answer the following in one or two sentences:

Question (a)
What is an infectious disease?
Answer:
When diseases spread from one person to another person, they are called infectious diseases.

Question (b)
What are the mediums of the spread of diseases?
Answer:
Diseases spread through mediums like food, water, air and insect bite. Sometimes it also spreads by coming in direct contact with a diseased person.

Question (c)
What happens when there is an epidemic of disease?
Answer:
When many people in one area get the same infectious disease at the same time, we say there is an epidemic of the disease. During an epidemic air and water gets contaminated with the disease germs and the disease spreads rapidly. Contaminated water also contaminates the food. If the epidemic is severe many people become serious and need to be hospitalised. To control the epidemic one needs to maintain hygiene and a clean surrounding.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 23 Infectious Diseases and how to Prevent them

Question (d)
What is vaccination?
Answer:
When a person is given a vaccine against a specific disease, he develops resistance to that disease. This process of giving vaccine is called vaccination. Whooping cough diphtheria and tetanus called triple vaccine is given.

Question (e)
Make a list of the vaccination given to a new bom baby.
Answer:
The table given below shows the list of vaccinations given to the new bom baby along with the schedule of when the vaccination is given:

Vaccine givenDisease against which it is givenAge of the new bom baby when it is given
BCG VaccineAgainst Tuberculosiswithin 15 days after baby is just born
Hepa B vaccineJaundice caused by Hepatitis B vimsAs soon as the baby is born
Oral PolioAgainst PolioWithin 2 weeks
Triple vaccineAgainst Diphteria, whooping cough and tetanusAfter 6 weeks baby is born

Triple vaccine is repeated twice again after 10 weeks and 14 weeks after the baby is bom. Hep. B vaccine is also repeated twice after 4 weeks and 8 weeks after birth. After completing a year the baby is given vaccine against measles, mumps and rubella. It is called MMR vaccine.

4. True or False:

Question (a)
Intestinal diseases spread though air.
Answer:
False

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 23 Infectious Diseases and how to Prevent them

Question (b)
Some diseases are caused by the anger of gods
Answer:
False

5. Classify the diseases given below as diseases that spread through food, through water, and through air:

Question 1.
Classify the diseases given below as diseases that spread through food, through water, and through air:
Malaria, Typhoid, Cholera, Tuberculosis, Jaundice, Gastro, Diarrhoea, Diphtheria, Conjunctivitis, Chickenpox.
Answer:

Through FoodThrough WaterThrough Air
TyphoidTyphoidTuberculosis
CholeraCholeraDiphtheria
JaundiceJaundiceConjunctivitis
Gastro DiarrhoeaDiarrhoeaChickenpox

6. Give reasons.

Question (a)
When there is an epidemic of cholera, we should boil water before drinking.
Answer:
Sometimes water gets mixed with faeces of person who is suffering from the cholera and it gets contaminated. When people drink this contaminated water an epidemic of cholera spreads.
Boiling the water kills the germs causing the disease and hence one is prevented from getting cholera.
Therefore during an epidemic of cholera one should boil water and drink.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 23 Infectious Diseases and how to Prevent them

Question (b)
We should not allow puddles of water to stand in our surroundings.
Answer:
When water stagnates in a puddle, mosquitoes lay eggs in the water and they increase in number. Mosquito bite spread malaria germs and people suffer from malaria. To prevent people from getting malaria mosquitoes should be stopped from breeding. To prevent mosquitoes from breeding we should not allow puddle of water to stand in our surrounding.

Environmental Studies Part 1 Standard 5th Solutions Chapter 23 Infectious Diseases and how to Prevent them Additional Important Questions and Answers

Fill in the blank with the correct answers from the options given below:

Question 1.
……………….. cause diseases.
(a) Microorganisms
(b) Bacteria
(c) Germs
Answer:
(a) Microorganisms

Question 2.
Every …………………. is caused by a specific microorganism or germ.
(a) illness
(b) disease
(c) flu
Answer:
(b) disease

Question 3.
The germs of disease like influenza are present in the spit or ………………… of the person who has the disease.
(a) tongue
(b) nose
(c) saliva
Answer:
(c) saliva

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 23 Infectious Diseases and how to Prevent them

Question 4.
When diseases spread through food it is called ………………. .
(a) food poisoning
(b) viral
(c) infection
Answer:
(a) food poisoning

Question 5.
Malaria is caused due to bite of a certain kind of ………………… .
(a) animal
(b) mosquito
(c) bird
Answer:
(b) mosquito

Question 6.
Germs of diseases like conjunctivitis spreads through …………………. .
(a) air
(b) water
(c) faces
Answer:
(a) air

Question 7.
Cholera spreads when people drink ……………. water.
(a) good
(b) contaminated
(c) bottled
Answer:
(b) contaminated

Question 8.
People who have a serious infectious disease like tuberculosis or swine flu are ……………….. .
(a) hospitalised
(b) educated
(c) quarantined
Answer:
(c) quarantined

Question 9.
As soon as the baby is born it is given ………………. vaccine.
(a) tuberculosis
(b) triple
(c) polio
Answer:
(a) tuberculosis

Question 10.
The …………………. vaccine is given orally.
(a) conjunctivitis
(b) polio
(c) malaria
Answer:
(b) polio

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 23 Infectious Diseases and how to Prevent them

Question 11.
When the germs of a particular disease enter the body and begins to grow, the person gets the …………… .
(a) food
(b) disease
(c) cough
Answer:
(b) disease

Question 12.
Disease of the throat and the chest spread through the ………………. .
(a) water
(b) faeces
(c) air
Answer:
(b) faeces

Question 13.
People get ………………. or diarrhoea after eating contaminated food at a function.
(a) flue
(b) gastro
(c) viral
Answer:
(b) gastro

Question 14.
Maintaining ……………….. everywhere is beneficial for our health.
(a) food
(b) cleanliness
(c) disease
Answer:
(b) cleanliness

Question 15.
It is important to always keep our food ……………….. .
(a) covered
(b) uncovered
(c) uncooked
Answer:
(a) covered

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 23 Infectious Diseases and how to Prevent them

Question 16.
Insects like mosquitoes, lice and fleas spread …………………. .
(a) beauty
(b) health
(c) disease
Answer:
(c) disease

Question 17.
Ringworm, scabies are disease that affect the …………….. .
(a) head
(b) skin
(c) bones
Answer:
(b) skin

Question 18.
Germs of disease like the flu or conjunctivitis spread quickly through the …………….. .
(a) air
(b) water
(c) fire
Answer:
(a) air

Question 19.
If, at some place, mosquitoes ……………… in large numbers then many people there can get malaria
(a) beautify
(b) breed
(c) creed
Answer:
(b) breed

Question 20.
Air, water, food and insects are the ……………….. through which disease spread.
(a) mediums
(b) area
(c) report
Answer:
(a) mediums

Question 21.
It is possible to ……………….. a disease from ecoming an epidemic.
(a) familiarize
(b) prevent
(c) breed
Answer:
(b) prevent

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 23 Infectious Diseases and how to Prevent them

Question 22.
To prevent disease from spreading through water, it is ………………… at the water works.
(a) diluted
(b) polluted
(c) purified
Answer:
(c) purified

Question 23.
When there is an epidemic of gastro or jaundice, people are advised to ………………. water before drinking it.
(a) cook
(b) steam
(c) boil
Answer:
(c) boil

Question 24.
To prevent mosquitoes from breeding, we must ensure there is no ……………… water in the surroundings.
(a) stagnant
(b) flowing
(c) rippling
Answer:
(a) stagnant

Question 25.
Clothes and utensils used by patients are washed with ………………… .
(a) pesticides
(b) germicides
(c) fertilizers
Answer:
(b) germicides

Question 26.
Our body develops …………….. to a particular disease due to vaccination.
(a) resistance
(b) persistance
(c) deliverance
Answer:
(a) resistance

Question 27.
The vaccines for diphtheria, whooping cough and tetanus are combined into a ………………. vaccine and given as an injection.
(a) single
(b) double
(c) triple
Answer:
(c) triple

Question 28.
Polio Vaccine is given …………………… .
(a) verbally
(b) mentally
(c) orally
Answer:
(c) orally

Question 29.
Primary Health Centres have been established at the ……………. level.
(a) urban
(b) village
(c) grass root
Answer:
(b) village

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 23 Infectious Diseases and how to Prevent them

Question 30.
It is in now forbidden by law to ……………….. in a public place.
(a) spit
(b) sit
(c) stand
Answer:
(a) spit

Question 31.
………………….. media are also used for raising public awareness about health and hygiene issues.
(a) Mass
(b) Public
(c) Home
Answer:
(a) Mass

Question 2.
Match the columns:

Group ‘A’Group ‘B’
(a) Ringworm1. Contaminated Air
(b) Jaundice2. Direct contact
(c) Tuberculosis3. Open wound contaminated with soil
(d) Dengue4. Contaminated food and water
(e) Tetanus5. Mosquito bite

Answer:

Group ‘A’Group ‘B’
(a) Ringworm2. Direct contact
(b) Jaundice4. Contaminated food and water
(c) Tuberculosis1. Contaminated Air
(d) Dengue5. Mosquito bite
(e) Tetanus3. Open wound contaminated with soil

Name the following:

Question 1.
Insect that causes Malaria.
Answer:
Female Anopheles Mosquito

Question 2.
Insect that causes Dengue.
Answer:
Aedes mosquito

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 23 Infectious Diseases and how to Prevent them

Question 3.
Vaccine for diphtheria, whooping cough and tetanus (Given as injection).
Answer:
Triple vaccine

Question 4.
Microorganisms that are useful to us.
Answer:
Microorganisms converting milk into yoghurt or microorganisms fermenting batter for idlis.

Question 5.
Germicide used to kill microorganisms in the spittle of a person having tuberculosis.
Answer:
Phenyl or dettol.

Question 5.
State whether the following statements are True or False:

  1. Vaccination helps our body to develop resistance against diseases.
  2. Community programmes are being undertaken every year at the National level to eradicate (put an end) polio, by giving oral vaccine of polio to children below five years.
  3. On television people are educated about right methods of handling, drinking water so to make them aware of how diseases can be prevented.
  4. Insects like lice and fleas spread diseases.
  5. Cancer is an infectious disease.

Answer:

  1. True
  2. True
  3. True
  4. True
  5. False

Answer the following in one or two sentences:

Question 1.
Name the disease that has been completely eradicated (that is it has completely disappeared) by vaccination.
Answer:
The disease called small pox has been completely eradicated by vaccination.
(Note : Now no one in the world is gets the scare or is suffering from small pox.)

Question 2.
Which disease spreads through flea’s bite?
Answer:
Fleas spread diseases like plague when they bite.
(Note : Fleas are found on the bodies of pets like dogs, cat and also on rhodents like rats.)

Question 3.
Why should we cover our nose and mouth when we cough or sneeze?
Answer:
Disease of the throat and chest spread through the air. When other breathe the same air, germs enter their bodies. That is why we must cover our nose and mouth when we cough or sneeze.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 23 Infectious Diseases and how to Prevent them

Question 4.
What is ‘food poisoning’?
Answer:
Gastro or diarrhoea spreads through contaminated3 food. When we eat this food the disease spread is called food poisoning.

Question 5.
Why should food always be kept covered?
Answer:
When some flies sit on our food, the germs enter the food. Later when we eat this food the germs enter our body, so we must always cover the food.

Question 6.
What is an epidemic?
Answer:
When many people in one area get the same infectious disease all at the same time, we say that there is an epidemic of the disease.

Question 7.
What precaution can be taken to prevent the spread of tuberculosis?
Answer:
The spittle of a person who has tuberculosis is collected in a vessel and covered with a germicide like phenyl. Such precautions can help to prevent the disease from spreading.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 23 Infectious Diseases and how to Prevent them

Give scientific reasons:

Question 1.
Doctors give tetanus vaccine after getting a cut or wound while handling a sharp instrument or after falling down and getting bruised badly while playing.
Answer:
Tetanus germs are present in the soil, dung and dust. The sharp instrument may be dirty, so it may carry the tetanus germs. These germs may then spread though the wound and cause disease. To prevent tetanus germs from spreading doctors give the vaccine which help us develop resistance against this disease.

Question 2.
A person suffering from a disease should cover the mouth when sneezing or coughing.
Answer:
Disease causing organisms are present in the spit or saliva of the person. When they sneeze or cough these gems spread in the air and cause disease in other people. To prevent the spread of disease through the air a person suffering from a disease should cover the mouth while sneezing or coughing.

Question 3.
Before eating or handling food one should wash the hands using soap and water.
Answer:
Soap kills the germs which cause diseases and water washes them away. If our hand is dirty then they may contain disease causing germs. If we handle food, or eat food without washing, the germs will enter the food and contaminate it with these germs. This can cause intestinal diseases or food poisoning. Hence it is advised that one should wash the hands using soap and water before eating or handling food.

Question 4.
People who are suffering from tuberculosis or swine flu are quarantined and kept in hospitals.
Answer:
The diseases like tuberculosis and swine flu are infectious. They spread through air easily. Also the germs spread cause disease in a healthy person if the healthy person comes in contact directly with the diseased person. In hospitals there are separate wards for such diseased people, where extra care and precautions are taken to prevent spread of diseases. Therefore patients suffering from these diseases are quarantined and kept in hospital.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 23 Infectious Diseases and how to Prevent them

Can you tell:

Question 1.
When your friends fall while playing and get hurt, does anyone tell you ‘Don’t go near them. You will also yet hurt’?
Answer:
No, no one tells us like that because we will not get hurt because the friend is hurt.

Question 2.
Suppose your mother has a headache. Do you also get a headache if you go near her?
Answer:
No, I do not get a headache if I go near her.

Question 3.
When is it that you are told not to go near a sick person, not to use their utensils for eating or drinking; not to use their hankies, towels or clothes?
Answer:
We are told not to go near a sisk person when the person is suffering from cold, flu, is having high fever, or if the person is suffering from chicken pox, measles, mumps etc.

Question 4.
Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 23 Infectious Diseases and how to Prevent them 1
What different activities are going on in the above picture.
Answer:
Women are washing clothes in the river. A boy is urinating in the water. A man is washing utensil and filling it with water. Buffaloes are being washed in the water. Children are swimming and a lady is filling pots with water to use for drinking purpose.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 23 Infectious Diseases and how to Prevent them

Question 5.
Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 23 Infectious Diseases and how to Prevent them 2
What do you see in the picture below above?
Answer:
Food is kept open. People are being served this uncovered food and they are eating it. The man serving the food is wearing dirty colthes. There is no cleanliness maintained in the restaurant.

Question 6.
What steps will you take to ensure that dust and flies do not settle on the food in your house?
Answer:
The food will be covered properly to see that no dust and flies settle on it. It will be kept in clean and closed utensils in the kitchen. Care will be taken to see that the kitchen is kept clean. So that no flies will sit there.

Question 7.
Why should you not go to school if you have conjunctivitis?
Answer:
Conjunctivitis causing germs spreads through air. If we go to school many other children will also get this disease. To prevent the spread of this disease, we should not go to school when suffering from conjunctivitis.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 23 Infectious Diseases and how to Prevent them

Glossary:

  1. conjunctivitis – sore eyes, which causes irritation.
  2. forbidden -not allowed.
  3. contaminated – to make impure by adding some substance.
  4. stagnates – gets collected.

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 5 Evolution of Mankind

Balbharti Maharashtra State Board Class 5 Environmental Studies Solutions Chapter 5 Evolution of Mankind Notes, Textbook Exercise Important Questions and Answers.

Maharashtra State Board Class 5 EVS Solutions Part 2 Chapter 5 Evolution of Mankind

5th Std EVS 2 Digest Chapter 5 Evolution of Mankind Textbook Questions and Answers

1. Fill in the blank.

Question a.
Homo is a Latin word which means ____________.
Answer:
Homo is a Latin word which means man.

Question b.
The Neanderthals primarily lived in ____________.
Answer:
The Neanderthals primarily lived in caves.

2. Answer question in one sentence.

Question a.
Who is said to have first made tools like the hand-axe?
Answer:
Homo erectus is said to have first made tools like a hand-axe.

Question b.
What is heredity?
Answer:
Heredity is similarity in appearance and health characteristics of human beings to their ancestors.

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 5 Evolution of Mankind

3. Give reasons for the following.

Question a.
The Neanderthals became extinct.
Answer:

  1. Homo sapiens were the neighbours of the Neanderthals in Europe. Conflicts with the Homo sapiens took place; wherein the Neanderthals suffered.
  2. The Neanderthals failed to adapt to environmental changes. As a result, the Neanderthals became extinct.

Question b.
Humans could produce subtle and varied types of sounds.
Answer:

  1. Homo sapiens had developed to a stage wherein they had fully developed larynx.
  2. Their jaws and muscles inside the mouth were fully developed.
  3. Their tongue was flexible. Therefore, human beings (Homo sapiens) could produce subtle and varied types of sounds.

4. Read the clues given below and find the words hidden in the box.

Question 1.
Read the clues given below and find the words hidden in the box.
Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 5 Evolution of Mankind 1

  • Humans who stood upright.
  • A sound that Neanderthals could make.
  • Humans who used their hands.
  • Homo sapiens sapiens began to grow this in fields.
  • Pieces of stone used to make tools.
  • It kept Homo erectus warm although they could not make it.
  • A country in which remains of Homo habilis were found.
  • A way of preparing food that Neanderthals used.
  • A tool made by Homo erectus.
  • Homo sapiens could do this to make pictures.
  • Humans could use their hands because they learnt to stand on two of these.
  • The country in which remains of Neanderthals were first found.
  • These were buried with them when Neanderthals died.

Activity :

Question 1.
Prepare a chart to show the progress of Man at the various stages from Homo habilis to Homo sapiens sapiens.

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 5 Evolution of Mankind

Environmental Studies Part 2 Standard 5th Solutions Chapter 5 Evolution of Mankind Additional Important Questions and Answers

Fill in the blanks :

  1. The species of humans who could use their hands effectively is known as the ……….. human.
  2. The scientist Louis Leakey who discovered this species named it …………………
  3. Homo habilis could ………………… on two feet and walk.
  4. The spine of Homo habilis was slightly ……. and not quite erect.
  5. The stone tools made by Homo habilis were not useful for hunting ………. animals.
  6. Homo habilis was a ………….
  7. Homo erectus marks an important stage in human ………….
  8. Compared to Homo habilis, Homo erectus has a more ……………………. brain.
  9. Homo erectus species lived in ……….
  10. During the time of ……………….., the earth was covered with ice sheets.
  11. Homo erectus made tools like the
  12. The remains of Homo erectus have been found along with his ……………………. in the continents of Africa, Asia and Europe.
  13. The …………………. man was physically big and strong
  14. His……………….. was more developed than that of Homo erectus.
  15. They made tools out of big ……………….
  16. The Neanderthals hunted ………. animals.
  17. They used ………………… clothing.
  18. They were mainly …………….. eaters.
  19. They ate meat…………… on fire.
  20. They knew the art of making………
  21. Some scientists believe that the Neanderthals communicated with each other by producing ……… and other primary sounds.
  22. Neanderthals had established some ………… of burying the dead.
  23. Some groups of Neanderthals left …………………. and migrated up to the continents of Europe and Asia.
  24. They had to …………. new ways of living and finding food.
  25. ………………… is the name used for humans that were more advanced than the Neanderthals.
  26. Homo sapiens means ……………. Man.
  27. The ………….. became extinct about 30,000 years ago
  28. In Europe, Homo sapiens is also known as ……………. Man.
  29. Homo sapiens used to make stone ……………. and fix them in grooves’ and notches made in wood or bone handles.
  30. Homo sapiens could produce a variety of ……………. and modulate his ……… ….. the way he liked.
  31. Homo sapiens had a well-developed ……………. system.
  32. Homo sapiens could draw…………….. on the basis of actual observation as well as imagination.
  33. The capacity of the human brain and his grasping power went on continuously.
  34. ………………. is a science that studies heredity.
  35. Genetics research has shown that we have inherited some traits of the ………….. man.
  36. Homo sapiens sapiens developed the technique of cultivating ………….. and keeping ………………..
  37. He began to live a more …………. life.
  38. The changed lifestyle and diet affected the …….. of humans.
  39. The name ……………………. reflects his intellectual and cultural rather than his physical prowess”.
  40. In Europe, …………… is also known as Cro-Magnon Man’.
  41. The stone tools made by ………… were not useful for hunting big animals.

Answer:

  1. skilled
  2. Homo
  3. stand
  4. bent
  5. big
  6. forager
  7. evolution
  8. developed
  9. groups
  10. Homo erectus
  11. hand-axe
  12. tools
  13. Neanderthal
  14. brain
  15. pebbles
  16. big
  17. leather
  18. meat
  19. roasted
  20. fire
  21. grunts
  22. rituals
  23. Africa
  24. adopt
  25. Homo sapiens
  26. Intellectual
  27. Neanderthal
  28. CroMagnon
  29. blades
  30. sounds, voice
  31. language
  32. pictures
  33. developing
  34. Genetics
  35. Neanderthal
  36. land, animals
  37. settled
  38. appearance
  39. Homo sapiens sapiens
  40. Homo sapiens
  41. Homo habilis

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 5 Evolution of Mankind

Match the columns :

Question 1.

Column ‘A’Column ‘B’
1. Homo habilisa. The man who stands erect.
2. Homo erectusb. Intellectual Man.
3. Neanderthal Manc. A man who uses his hands skillfully.
4. Homo sapiensd. Remains found in Europe, Asia, Africa.
5. Cro-Magnon Mane. Knew the art of making fire.
6. Louis Leakeyf. Science that studies heredity.
7. Neanderthal Mang. Made tools like the hand-axe.
8. Homo erectush. Had a well developed language system
9. Homo sapiensi. Remains found in Germany.
10. Geneticsj. Discovered the species ‘Homo habilis’

Answer:

Column ‘A’Column ‘B’
1. Homo habilisc. A man who uses his hands skillfully.
2. Homo erectusa. The man who stands erect.
3. Neanderthal Mane. Knew the art of making fire.
4. Homo sapiensb. Intellectual Man.
5. Cro-Magnon Mand. Remains found in Europe, Asia, Africa.
6. Louis Leakeyj. Discovered the species ‘Homo habilis’
7. Neanderthal Mani. Remains found in Germany.
8. Homo erectusg. Made tools like the hand-axe.
9. Homo sapiensh. Had a well developed language system
10. Geneticsf. Science that studies heredity.

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 5 Evolution of Mankind

Answer if the following statements are True/False. If false, then state the correct answer:

Question 1.

  1. The scientist Louis Leakey named the first species of humans as Homo erectus.
  2. In Latin “Homo’ means ‘man’.
  3. Homo erectus means The man who can use his hands skilfully
  4. The stone tools made by Homo habilis were not useful for hunting big animals.
  5. Homo habilis was not a forager”
  6. Homo erectus species lived in groups.
  7. Homo erectus knew the technique of making fire.
  8. Homo erectus made tools like the hand-axe.
  9. The Neanderthal Man was more developed than that of Homo erectus.
  10. The Neanderthal Man hunted small animals.
  11. The Neanderthal Man knew the art of making fire.
  12. The Neanderthals established some rituals of burying the dead
  13. Some groups of Neanderthals left Africa and migrated to India
  14. Homo sapiens means Intellectual Man.
  15. The Neanderthals became extinct about 30,000 years ago
  16. Homo sapiens is also known as the ‘Cro Magnon Man’ in Europe.
  17. The Homo sapiens could only grunt and make some sounds.
  18. Genetics is a science that studies heredity.
  19. The changed lifestyle and diet affected the appearance of humans.
  20. Homo sapiens sapiens reflects his intellectual and culture rather than his physical prowess.

Answer:

  1. False. The scientist Louis Leakey named the first species of humans as Homo habilis.
  2. True.
  3. False. Homo habilis means “The man who can use his hands skilfully’.
  4. True.
  5. False. Homo habilis uns a forager.
  6. True
  7. False. Homo erectus knew the use of fire but had not mastered the technique of making fire.
  8. True
  9. True.
  10. False. The Neanderthal Man hunted big animals.
  11. True.
  12. True.
  13. False. Some groups of Neanderthals left Africa and migrated to the continents of Europe and Asia.
  14. True.
  15. True.
  16. True.
  17. False. The Homo sapiens has a well-developed language system.
  18. True.
  19. True
  20. True.

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 5 Evolution of Mankind

Answer the following questions in one sentence each:

Question 1.
What was the species of humans who could use their hands effectively known as?
Answer:
The species of humans who could use their hands effectively is known as ‘The skilled human

Question 2.
Where was the first evidence of this species found?
Answer:
The first evidence of this species was found in the border region between Tanzania and Kenya in the continent of Africa.

Question 3.
What was this species named and by which scientist?
Answer:
The scientist Louis Leakey who discovered this species, named it “Homo habilis’.

Question 4.
What does Homo habilis mean?
Answer:
Homo habilis means ‘the one who uses his hands skillfully.

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 5 Evolution of Mankind

Question 5.
Why was he called Homo habilis?
Answer:
He was called Homo habilis because besides their fossilized remains, some tools made by them were also found.

Question 6.
Give two uses of the stone tools made by Homo habilis.
Answer:
The stone tools made by Homo habilis had limited uses such as scraping” meat from the skin of dead animals or breaking bones to get the marrows

Question 7.
How did Homo habilis acquire his food?
Answer:
Homo habilis was a forager. It is possible that he hunted small animals, gathered eggs, wild fruits and roots to eat.

Question 8.
What does Homo erectus mean?
Answer:
Homo erectus means ‘the one who stands erect’.

Question 9.
How did Homo erectus survive the extreme climatic conditions during the ice-age?
Answer:
Homo erectus could survive the extreme climatic conditions during the ice-age because he knew the use of fire but had not mastered the technique of making fire.

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 5 Evolution of Mankind

Question 10.
Where have the remains of Homo erectus been found?
Answer:
The remains of Homo erectus have been found in the continents of Africa, Asia and Europe.

Question 11.
Where were the remains of the Neanderthal Man found?
Answer:
The remains of the Neanderthal Man were first found at Neanderthal in Germany.

Question 12.
How did the Neanderthal Man eat roasted meat?
Answer:
The Neanderthal knew the art of making fire and hence ate roasted meat.

Question 13.
How did the Neanderthal Man communicate with each other?
Answer:
The Neanderthals communicated with each other by producing grunts and other primary sounds.

Question 14.
Where did the Neanderthal Man migrate?
Answer:
Some groups of Neanderthal Man left Africa and migrated up to the continents of Europe and Asia.

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 5 Evolution of Mankind

Question 15.
What was the challenge to the Neanderthal Man in Europe and Asia?
Answer:
The Neanderthals had to adopt to the new way of living and finding food as they had to face a different environment.

Question 16.
Which Species of humans were more advanced than the Neanderthal Man?
Answer:
The Homo sapiens was more advanced than the Neanderthal Man.

Question 17.
What does Homo sapiens mean?
Answer:
Homo sapiens means Intelligent or Intellectual man.

Question 18.
How many years ago did the Neanderthal Man become extinct?
Answer:
The Neanderthal Man became extinct about 30,000 years ago

Question 19.
What are Homo sapiens known as in England?
Answer:
Cro-Magnon man.

Question 20.
Where have their remains been found?
Answer:
Their remains have been found in Europe, Asia and Africa.

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 5 Evolution of Mankind

Question 21.
Describe the tools used by the Cro-Magnon man.
Answer:
The Cro-Magnon man used tools made of stone blades and fixed them in grooves and notches made of wood or bone handles.

Question 22.
Why was the human species later called as Homo Sapiens Sapiens?
Answer:
The human species was later known as Homo sapiens sapiens as their capacity to think developed even further than that of Homo sapiens.

Question 23.
What is Genetics?
Answer:
Genetics is a science that studies ‘heredity’.

Give reasons for the following:

Question 1.
Homo habilis was a forager.
Answer:
i. Homo habilis was a forager.
ii. This is because he ate the leftovers of animals that had been hunted by others.

Question 2.
Homo erectus could survive during the ice age.
Answer:
i. During the time of Homo erectus, the earth was covered with icesheets and the climate was extremely cold.
ii. As the Homo erectus had learnt the use of fire, he could survive the extreme climate.

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 5 Evolution of Mankind

Question 3.
The human species Homo Neanderthalensis was known as the Neanderthal Man.
Answer:
The human species Homo Neanderthalensis was commonly known as the Neanderthal Man because his remains were first found in Neanderthal in Germany.

Question 4.
The Neanderthals ate meat roasted on fire.
Answer:
i. The Neanderthals knew the art of making fire.
ii. As they were meat eaters, they ate meat roasted on fire.

Question 5.
Homo sapiens had a well-developed language system.
Answer:
i. The Homo sapiens could produce a variety of sounds and modulate his voice.
ii. Using his imagination, he could name the things around him and soon could put his thoughts and feelings into words thus developing a language system.

Question 6.
The Homo sapiens was named as an Intelligent Man.
Answer:

  1. During the course of their evolution, Homo sapiens had developed a language system.
  2. He could also draw pictures on the basis of observation and imagination.
  3. Hence, he was named as an Intelligent Man.

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 5 Evolution of Mankind

Question 7.
It is said that the Neanderthal Man and Homo sapiens are both ancestors of the modern humans.
Answer:
i. Genetic research has shown that the modern man has inherited some traits of the Neanderthal Man.
ii. Thus, it can be said that the Neanderthal Man and Homo sapiens are both ancestors of the modern humans.

Answer the following in brief :

Question 1.
Why was the first human species named Homo habilis?
Answer:

  1. The scientist Louis Leakey who discovered this first human species named it ‘Homo habilis’.
  2. He found some tools made by them beside their fossilized remains.
  3. In Latin ‘Homo habilis’ means the man who can use his hands skillfully.
  4. Thus, the first human species got their name.

Question 2.
Describe Homo habilis.
Answer:

  1. Homo habilis could stand on two feet and walk.
  2. His spine was slightly bent and was not quite erect.
  3. His brain was bigger than the apes although – he looked somewhat similar.

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 5 Evolution of Mankind

Question 3.
Give the two uses of the stone tools made by Homo habilis.
Answer:

  1. The stone tools made by Homo habilis were not useful for hunting big animals.
  2. They had limited uses such as scraping meat from the skin of dead animals.
  3. They were also used for breaking bones to get the marrow.

Question 4.
Homo erectus knew the use of fire – Explain.
Answer:

  1. During the time of Homo erectus, the Earth was covered with icesheets, hence the climate was extremely cold.
  2. Homo erectus could survive that extreme climate because he had learnt to use fire.
  3. However, he had not yet mastered the technique of making fire.

Question 5.
Compare the Neanderthal Man to his predecessors.
Answer:

  1. The Neanderthal Man was physically big and strong.
  2. His brain was more developed.
  3. He made tools out of big pebbles. The tools were fixed on a bone or a wooden shaft to make weapons like the spear, axe etc.
  4. He hunted big animals, ate their meat and used their leather as clothing.
  5. He knew the art of making fire.

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 5 Evolution of Mankind

Question 6.
How did the Neanderthal Man make fire?
Answer:
i. The Neanderthals knew the technique of making fire.
ii. They rubbed sticks of hard wood on each other or by striking one flintstone on another to obtain sparks.

Question 7.
How did the Neanderthals treat their dead?
Answer:

  1. When a member of the group died, the Neanderthals buried tools, horns etc. along with the dead body.
  2. They applied red ochre to the dead body before burying it.
  3. The Neanderthals thus established some rituals of burying the dead.

Question 8.
Describe the tools made by Homo sapiens.
Answer:
i. Homo sapiens made different kinds of tools and implements to suit the tasks they needed to do.
ii. They made sharp blades of stone and fixed them in grooves and notches made in wood or bone handles.

Question 9.
Why was the Homo sapien called “The Thinking Man’?
Answer:

  1. The tools made by Homo sapien were sharper and more precise than the other species.
  2. He had a well-developed language system.
  3. He could draw pictures on the basis of observation as well as imagination.
  4. Hence, he was called as The Thinking Man’.

Question 10.
Describe the development of the Homo sapiens.
Answer:

  1. Homo sapiens sapiens developed the technique of cultivating land and keeping animals.
  2. With his well-developed capacity to think, the speed at which he improved his technology went on increasing
  3. He lived a more settled life.
  4. He began to grow food grains in the fields.

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 5 Evolution of Mankind

Question 11.
The name Homo sapiens sapiens reflects his intellectual and cultural rather than his physical prowess – Explain.
Answer:

  1. Modern humans are not satisfied with only meeting their basic need for food.
  2. To enrich their life, human beings acquired a culture and continued to develop it.
  3. The technological and cultural progress achieved by modern humans has been extremely rapid.
  4. Hence, we can rightly say that the life of the Homo sapiens sapiens reflects his intellectual and cultural progress rather than his physical prowess.

Glossary :

  1. effectively : in such a manner as to achieve a desired result
  2. skillfully : with expertise
  3. grunts : low short sound
  4. appearance : the way something or someone looks
  5. established : existed and recognised
  6. migrated : move from one region to another
  7. grooves : a long narrow cut in a hard material
  8. notches : an incision on a surface
  9. modulate : change the o tone pitch of voice
  10. prowess : skill in a particular field
  11. pebbles : small stones
  12. adopt : choose to take up on follow
  13. forager : someone who reaches for food
  14. scraping : remaining from a surface with forceful strokes
  15. marrow : a tissue o in the body, next to bones
  16. roasted : cooked
  17. ancestors: a person from whom one is descended
  18. subtle: very delicate and precise
  19. larynx : a hollow passage holding the vocal cords in the human body
  20. traits : a distinguishing quality
  21. predecessors : someone who came before
  22. ochre : an earthy clay-like thing

Maharashtra Board Class 12 Biology Notes Chapter 3 Inheritance and Variation

By going through these Maharashtra State Board 12th Science Biology Notes Chapter 3 Inheritance and Variation students can recall all the concepts quickly.

Maharashtra State Board 12th Biology Notes Chapter 3 Inheritance and Variation

Chromosomes and Mechanism of inheritance-

1. Heredity or inheritance : The transmission of genetic information from generation to generation.
2. Gregor Mendel : He used hybridization techniques and gave explanation for heredity.
He postulated principles of heredity.
3. Correns was other contemporary German botanist.

Note : Carl Correns discovered principles of heredity independently and verified work of Mendel by experimenting on other model organisms. He did not propose fundamental laws of heredity as mentioned in textbook. Laws of heredity were given by Mendel.

4. Mendel gave the term factors, which is now 5 known as genes.

5. Reasons for Mendel’s success :

  • Carefully planned experiments.
  • Large sample of study. Meticulous recordings which gave the ratios.
  • Well-chosen contrasting characters which were recognizable.
  • Each character controlled by single factor.
  • Dominance and recessiveness among the pair of characters.

Maharashtra Board Class 12 Biology Notes Chapter 3 Inheritance and Variation

6. Seven pairs of contrasting characters of pea plant studied by Mendel were :

CharacterDominantRecessive
Seed shapeRoundWrinkled
Seed colourYellowGreen
Pod shapeInflatedConstricted
Pod colourGreenYellow
Flower colourPurpleWhite
Flower locationAxialTerminal
Plant heightTallDwarf/Short

Genetic Terminology-

  • Character : Specific feature that an organism possesses.
  • Trait : An inherited character with its variant form that can easily be seen. E.g. Tall or dwarf.
  • Factor : Unit of heredity responsible for the inheritance and expression of a genetic character. Initially considered to be in a particulate form.
  • Gene : Specific segment of DNA responsible for the inheritance and expression of that character.
  • Alleles or Allelomorphs : The two or more alternative forms of a given gene (factor). They are present on the identical loci on homologous chromosomes.
  • Dominant : An allele capable of expressing its trait even in the presence of an alternative allele is called a dominant allele. In heterozygous condition, dominant ones always show their expression. E.g. T allele.
  • Recessive : An allele that is not expressed in the presence of an alternative allele is called recessive allele. In heterozygous condition, they are never expressed. They are expressed only when they are in homozygous condition. E.g. T allele.
  • Phenotype : The external appearance of an organism which can be easily seen for any trait is called its phenotype. E.g. Tallness or dwarfness of pea plant. The ratio of phenotypes, i.e. external appearance of offspring produced in F2 and subsequent generation. E.g. 3 Tall: 1 dwarf is phenotypic ratio in monohybrid cross.
  • Genotype : Genetic constitution of an organism which decides the trait is called genotype. E.g. TT / Tt / tt are genotypes. The ratio of genotypes produced in the F<sub>2</sub> and subsequent generation is called genotypic ratio. E.g. 1 TT : 2Tt : 1 tt. (1:2:1 is genotypic ratio for monohybrid cross.)
  • Homozygous (pure): In homozygous condition, there are identical alleles for a particular trait. Homozygous produces only one type of gametes. E.g. TT (tall) or tt (dwarf).
  • Heterozygous: In heterozygous condition, there are pairs of contrasting alleles for a particular trait. Heterozygous or hybrid produces two types of gametes, E.g. Tt.
  • Pure line: An individual or a population which is homozygous for one or more traits, is called pure line.
  • Monohybrid: When one trait is considered during inheritance, it is called monohybrid. A cross considering only one heritable trait is called monohybrid cross. E.g. cross of pure tall and pure dwarf plants.
  • Dihybrid: When two traits are considered during inheritance, it is called dihybrid.
    A cross between parents differing in two heritable traits, is called dihybrid cross.
  • F1 generation / First filial generation: First generation formed by mating of pure parents having contrasting characters. E.g. Progeny of TT x tt.
  • F2 generation: Generation obtained by self¬breeding F1 organisms, is called F2 generation. E.g. Progeny of Tt x Tt.
  • Punnett square/checker board: A probability table representing different permutations and combination of fertilization between gametes of the opposite mating types.
  • Homologous Chromosomes: Identical chromosomes which are morphologically, genetically and structurally similar are homologous chromosomes.
  • Back cross: A cross of F1 progeny with any of the parents (e.g. F1 tall x pure tall; F1 tall x pure dwarf i.e. Tt x TT or Tt x tt).
  • Test cross: A cross of F1 progeny with homozygous recessive parent
    (e.g. F1 tall x pure dwarf i.e. Tt x tt).

 Mendel’s Laws of Inheritance-

  • Law of Dominance: When two homozygous individuals with one or more sets of contrasting characters are crossed, the alleles (characters) that appear in F1 are dominant and those which do not appear in F1 are recessive.
  • Law of segregation or Law of purity of gametes: When 1 hybrid forms gametes, the alleles segregate from each other and enter in different gametes. The gametes formed are pure because they carry only one allele each (either dominant one or recessive one.)
  • Law of Independent Assortment: When hybrid possessing two (or more) pairs of contrasting factors or alleles forms gametes, the factors in each pair segregate independently of the other pair.

Back cross Test cross-

  • Back cross: Back cross is the cross between F1 individual with one of the parent. (Either recessive or dominant).
  • Test cross: Test cross is the cross of F1 hybrid with the homozygous recessive parent.

Deviations from Mendel’s findings-

I. Mendel’s experiments gave the following generalizations:

  • Single trait due to single gene which has two alleles.
  • Two alleles interact with each other in which one allele is completely dominant.
  • Factors or genes for different traits are present on different chromosomes and they show independent assortment.

2. Later, different deviations were noted by the scientists who worked in post-Mendelian era. These findings form Neo-Mendelism.

3. The deviations from Mendel’s findings are of following types:

  • Phenomena of co-dominance and incomplete dominance: Shown by single trait due to single gene but its two alleles show interactions.
  • Multiple allelism: Single trait shown by single gene which has more than two alleles.
  • Polygenic inheritance: Single trait due to more than one gene which show interactions which are either epistastic or additive effect.
  • Pleiotropy: Many traits which are influenced by a single gene.

4. Gene interactions: When phenotypic expression of a gene is modified or influenced by the other gene, then it is called gene interactions.

  • Intragenic interactions: Interactions between the alleles of same gene. E.g. incomplete dominance and co-dominance. Also seen in the multiple allele series of a gene.
  • Intergenic (non-allelic) interactions: Interactions between the alleles of different genes present on the same or different chromosomes E.g., Pleiotropy, polygenes, supplementary and complementary genes.

Maharashtra Board Class 12 Biology Notes Chapter 3 Inheritance and Variation

5. Incomplete dominance: When both the alleles express themselves partially then it is called the incomplete dominance. Unlike as in complete dominance, here one allele cannot completely suppress the expression of the other allele. Thus there is formation of an intermediate expression in the F1 hybrid.
E.g. the flower colour of Mirabilis jalapa.

  • Red-flowered (RR) plant x White-flowered (rr) plant,
  • F1 offspring: Pink (Rr) flowers.
    Genotypic ratio – 1 RR : 2 Rr : 1 rr
    Phenotypic ratio – 1 Red : 2 Pink : 1 White

6. Co-dominance: When both the alleles of an allelomorphic pair express themselves equally in F1 hybrids then it is called co-dominance. Alleles that express themselves equally independently in hybrids, are co-dominant alleles.
E.g. Coat colour in cattle.

  • Red coat (RR) x white coat (W W).
  • F1 hybrids (RW) : Roan, (mixture of red and white). Both traits expressed equally.
    In F2 generation red (RR) : roans (RW) : white (WW) =1:2:1.
  • Co-dominance shows the genotypic and phenotypic ratios identical.

7. Multiple alleles :

  • When more than two alleles of a gene in a population occupy the same locus on a chromosome or its homologue, then such alleles are called multiple alleles.
  • Wild and original gene is mutated to form multiple alleles. There is a series of alleles which show dominance, co-dominance or incomplete dominance with the other recessive alleles among them. The most dominant is the wild type.

E.g. (1) Size of wings in Drosophila. From normal wings to vestigial wings (vg) in homozygous condition. (2) A, B, O blood groups in human beings.

8. Pleiotropy:

  • Pleiotropic gene is the single gene that controls two {or more) different traits.
    This phenomenon is called pleiotropy or pleiotropism.
  • Phenotypic ratio : 1 : 2 instead of 3:1 because of the death of recessive homozygote.
  • E.g. Sickle-cell anaemia, is caused by a gene Hbs.

Normal or healthy gene is dominant : HbA
Heterozygotes are carriers (HbA/Hbs). They show signs of mild anaemia.
Homozygotes with recessive gene Hbs die due to severe anaemia.
Thus, the gene for sickle-cell anaemia is lethal in homozygous condition and produces sickle-cell trait in heterozygous carrier.

(4) TWo different expressions are produced by a single gene. A marriage between two carriers will produce normal carriers and sickle-cell anaemic children in 1 : 2 : 1 ratio.

Chromosomal Theory of Inheritance

  • Hugo de Vries, Correns and von Tschermak, independently rediscovered Mendel’s work on the inheritance of traits in 1900.
  • Walter Sutton and Theodore Boveri (1903) put forth theory of chromosomal theory of inheritance after studying behaviour of meiotic chromosomes.

Chromosomes
(Chromo = colour, soma = body)

1. Carriers of heredity, chemically they are made up of DNA, histone and non-histone proteins.

  • The term ‘Chromosome’ was coined by W. Waldeyer (1888).
  • Chromosome number is specific for every species.

2. Ploidy: The degree of repetition of the primary basic number of chromosomes (i.e. ‘x’) in a cell.

  •  Euploidy : Euploidy is the condition in which the chromosome number in a cell is the exact multiple of the primary basic number.
  • Euploids are further divided into monoploid/haploid (n), diploids (2n), triploids (3n), tetraploid (4n), etc.
  • Aneuploidy : Aneuploidy is the condition in which the chromosome number shows either addition or deletion by one or more.

Maharashtra Board Class 12 Biology Notes Chapter 3 Inheritance and Variation 1

Maharashtra Board Class 12 Biology Notes Chapter 3 Inheritance and Variation

3. Structure of chromosome :
Parts of a typical chromosome :

  • Two chromatids arms joined together at centromere. Chromatid arm bears long, unbranched, slender, highly coiled DNA thread called chromonema.
  • Centromere or primary constriction : Has kinetochore. (Disk shaped structure at which i spindle fibres are attached during cell division.)
  • Secondary constriction : At secondary constriction I, nucleolus becomes organized during interphase.
  • A satellite body (SAT body) attached at secondary constriction II.
  • Telomeres : The ends of chromosomes.

4. Types of chromosomes : Classified as per 5 the position of centromere :

  • Acrocentric (j-shaped),
  • Telocentric (i-shaped),
  • Submetacentric (L-shaped) and
  • Metacentric (V-shaped).

5. Sex chromosomes : Sex chromosomes or allosomes are responsible for the determination of sex.

Linkage and Crossing Over

1. Linkage :

  • Tendency of two or more genes to be inherited together is called linkage. The genes showing linkage are called linked genes.
  • Bateson and Punnett discovered linkage in ; plants.
  • T. H. Morgan discovered linkage in animals.
  • Types of linkage : Complete linkage and Incomplete linkage :
    (i) Complete linkage : E.g. seen in X chromosome of Drosophila males.
    (ii) Incomplete linkage : E.g. seen in colour : and shape of grain of Zea mays.
  • Linkage Groups : All the linked genes in a particular chromosome.
  • The number of linkage groups of a particular species is equal to its haploid number of chromosomes.

2. Sex – linkage and Sex – linked inheritance

Maharashtra Board Class 12 Biology Notes Chapter 3 Inheritance and Variation 2

3. Crossing Over:

  • Process of formation of recombinations of genes by interchanging and exchanging the segments of non-sister chromatids of homologous chromosomes is called crossing over. Crossing over takes place in pachytene of prophase-I of meiosis.
  • Morgan coined the term crossing over.
  • The mechanism of crossing over : There are four sequential steps such as synapsis, tetrad formation, crossing over and terminalisation.
  • Due to crossing over, variations are produced which act as raw material for natural selection and thus helps in evolution.

4. Morgan’s Experiments showing linkage and crossing over :

  • (1) Drosophila melanogaster used for genetic experiments because :
    • Easily cultured in laboratory.
    • Life span is short of about two weeks.
    • High rate of reproduction.
  • Morgan explained the principle of linkage, sex linkage and crossing over.
  • According to his experiments :
    • Genes grouped on the same chromosome are strongly linked. Recombinations among them are only 1.3%.
    • Genes present far away from each other on chromosome are loosely linked and hence show more 37.2% recombinations.

Autosomal Inheritance-

  • Somatic cells of humans have 23 pairs of ; chromosomes. (2n)
  • 22 pairs are autosomes and 1 pair is sex chromosome.
  • Autosomes are concerned with bodily characters while sex chromosomes decide the sex of the individual.
  • Autosome linked traits show autosomal i inheritance. TWo types : (1) Dominant (Widow’s peak and Huntington’s disease) : (2) Recessive [Phenylketonuria (PKU), Cystic I fibrosis and Sickle-cell anaemia].

Sex-Linked Inheritance-

1. Sex-linked genes are present on non-homologous region of sex chromosomes.
2. Their inheritance is called sex-linked inheritance.
3. Types of sex-linked genes : X-linked genes, Y-linked genes and X-Y linked genes.

  • X-linked (sex-linked) genes : Located on non-homologous region of X chromosome. X-linked recessive genes show criss-cross i inheritance. E.g. Haemophilia, colour ; blindness, night blindness, myopia, muscular : dystrophy, etc.
  • Y-linked (Holandric) genes : Located on non- homologous region of Y chromosome. E.g. Hypertrichosis.
  • X-Y-linked genes : Located on homologous : region of X and Y chromosome and hence : called incompletely sex linked genes. E.g.
    Total colour blindness, nephritis and retinitis pigmentosa.
  • Red green Colour blindness : X-linked recessive disorder. Inability to distinguish red and green colours.
    Genotypes of male and female individuals for colour blindness are as follows :

Maharashtra Board Class 12 Biology Notes Chapter 3 Inheritance and Variation 3

4. Haemophilia (Bleeder’s disease): X-linked recessive disorder. Blood clotting does not take place due to lack of (VIII or IX) clotting factors in blood.
Genotypes of male and female individuals for haemophilia are as follows :
Maharashtra Board Class 12 Biology Notes Chapter 3 Inheritance and Variation 4
Remember : XhXh combination is lethal, such females do not survive.

Maharashtra Board Class 12 Biology Notes Chapter 3 Inheritance and Variation

Sex Determination-

  1. Bisexual or hermaphrodite or monoecious : The organisms in which both types of sex organs exist in the same body.
  2. Dioecious or unisexual : Organism has either male or female reproductive organs.
  3. German biologist, Henking in 1891, gave the concept of “X-body”. It was later understood that it is X chromosome.
  4. Sex Determination :

(1) Chromosomal :
Maharashtra Board Class 12 Biology Notes Chapter 3 Inheritance and Variation 5

Note : The diploid autosomal number may be different for different birds. It should be remembered as AA and not 2n (as given in Textbook page no. 65, Fig. 3.15). Because 2n will be diploid chromosome number including autosomes and sex chromosomes.

(2) Environmental : Seen in Bonellia viridis

  • Larva grown in vicinity of adult female grows into male.
  • Larva which drifts away from adult female grows into female.

Genetic Disorders-

Maharashtra Board Class 12 Biology Notes Chapter 3 Inheritance and Variation 6
Maharashtra Board Class 12 Biology Notes Chapter 3 Inheritance and Variation 7

Know your scientist :
Thomas Hunt Morgan

Contributions :

  • Chromosomal theory of heredity
  • Introduction of Drosophila in genetic research.
  • Principle of linkage, sex linkage and crossing over.
  • Key role in the field of genetics.
  • Nobel prize for Physiology and medicine (1933)

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 18 The Environment and Us

Balbharti Maharashtra State Board Class 5 Environmental Studies Solutions Chapter 18 The Environment and Us Notes, Textbook Exercise Important Questions and Answers.

Maharashtra State Board Class 5 EVS Solutions Part 1 Chapter 18 The Environment and Us

5th Std EVS 1 Digest Chapter 18 The Environment and Us Textbook Questions and Answers

1. What’s the solution?

Question 1.
Rivers and lakes are filled with water hyacinth.
Answer:
Water hyacinth are formed in rivers and lakes due to pollution. That is mainly due to mixture of detergents in the water. To control it the water hyacinth should be removed and waste water from households or washing clothes in water should be banned.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 18 The Environment and Us

2. Use your brain power!

Question 1.
What would happen if no kites (birds) are left in a particular region? Which living things would increase in number? Which would decrease?
Answer:
If no kites are left in a particular region the number of birds, amphibian, small mammals and earthworms would increase.

3. Answer the following questions.

Question (a)
What is meant by migration?
Answer:
Movement from one place to another for a short period of time or permanently is called migration.

Question (b)
Describe the life cycle of birds.
Answer:
Birds lay eggs. The eggs are hatched and after a few days, the small birds come out. They grow up in the nest. After three-four weeks they become an adult bird and start laying eggs.

Question (c)
Give two causes of air pollution.
Answer:
The two causes of air pollution are as follows:
1. Fuels are burnt in vehicles, give out certain poisonous gas and smoke.
2. Industries let out some poisonous gases into the air.

Question (d)
For what purpose do we use land obtained by clearing forests?
Answer:
We use land for agriculture, housing, industry and for building roads and railways by clearing forest.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 18 The Environment and Us

4. Give reasons:

Question (a)
It is important to conserve the living components of the environment.
Answer:
It is important to conserve the living components of the environment because:

  1. Due to human intervention in nature the non living components are getting polluted.
  2. So the living things are threatened.
  3. Several living things have already become extinct.
  4. If one factor of the environment is damaged, it disturbs environmental balance.
  5. The process of extinction is increasingly fast.
  6. This will be a threat to the whole living world.

Question (b)
The numbers of wild animals are falling day by day.
Answer:

  1. Forests have been cut down to make place for various reasons of man’s need.
  2. Forest provide shelter and food to the wild animals.
  3. If the plants on the earth are destroyed the number of animals also fall day by day.
  4. Because of hunting, the population of wild animals is falling.

5. True or False:

Question (a)
Dead plants and animals are a biotic components.
Answer:
False

Question (b)
It is necessary to conserve biodiversity.
Answer:
True

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 18 The Environment and Us

6. Classify the following as natural or man-made:

Question 1.
Classify the following as natural or man-made:
Soil, horse, stone, water hyacinth, book, sunlight, dolphin, pen, chair, water, cottonwool, table, trees, brick.
Answer:
Natural – horse, water hyacinth, sunlight, dolphin, water, trees, cottonwool.
Manmade – soil, stone, book, pen, chair, table, brick.

Environmental Studies Part 1 Standard 5th Solutions Chapter 18 The Environment and Us Additional Important Questions and Answers

Fill in the blanks with the correct answers from the options given below:

Question 1.
The population of the world is now close to hundred crore.
(a) four
(b) five
(c) six
Answer:
(c) six

Question 2.
Tremendous quantities of ………………… enter the air due to burning of fuels.
(a) oxygen
(b) nitrogen
(c) carban dioxide
Answer:
(c) carban dioxide

Question 3.
The ………………….. sanctuary is known for bisons.
(a) Radhanagari
(b) Tadoba
(c) Kaziranga
Answer:
(a) Radhanagari

Question 4.
…………………… state has declared the Nannaj area a sanctuary for the Great Indian Bustard.
(a) Maharashtra
(b) Madhya Pradesh
(c) Meghalaya
Answer:
(a) Maharashtra

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 18 The Environment and Us

Question 5.
In Madhya Pradesh, Devrais are known as ………….. .
(a) Devran
(b) Sharanvan
(c) Sharanrais
Answer:
(b) Sharanvan

Question 6.
Masrhy or low-lying areas are filled to …………….. the land.
(a) rebuild
(b) reclaim
(c) restore
Answer:
(b) reclaim

Question 7.
There are many types of ……………….. in forests.
(a) plants
(b) rivers
(c) dams
Answer:
(a) plants

Question 8.
Birds build their nests in ………………. .
(a) shrubs
(b) bushes
(c) trees
Answer:
(c) trees

Question 9.
Water sources get ……………… if waste water is let into them without processing.
(a) polluted
(b) clogged
(c) depleted
Answer:
(a) polluted

Question 10.
……………… water is also given out from factories into their surroundings.
(a) Waste
(b) Running
(c) Stagnant
Answer:
(a) Waste

Question 11.
If water from such polluted sources keeps soaking into the soil, it becomes ……………….. .
(a) fertile
(b) infertile
(c) marshy
Answer:
(b) infertile

Question 12.
Chemical fertilizers and pesticides are used on a large scale for ………………. .
(a) Horticulture
(b) Vermiculture
(c) Agriculture
Answer:
(c) Agriculture

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 18 The Environment and Us

Question 13.
…………………. is used in all homes.
(a) Fuel
(b) Coal
(c) Kerosene
Answer:
(a) Fuel

Question 14.
There are big industries and factories in which ……………… is used in great quantities.
(a) water
(b) smoke
(c) fuel
Answer:
(c) fuel

Question 15.
When the proportion of carbon dioxide in the air rises, it leads to rise in ………………….. .
(a) rain
(b) temperature
(c) pollution
Answer:
(b) temperature

Question 16.
When fuels are burnt in vehicles, they give out certain ……………… gases as well as smoke.
(a) poisonous
(b) polluted
(c) natural
Answer:
(a) poisonous

Question 17.
Industries also let out some ……………….. gases into the air.
(a) poisonous
(b) polluted
(c) natural
Answer:
(a) poisonous

Question 18.
Due to human ……………………. in nature, large scale changes are taking place in air, water and land.
(a) interval
(b) intervention
(c) invention
Answer:
(b) intervention

Question 19.
From time to time, some of the living things on the earth become ………………. .
(a) strong
(b) weak
(c) extinct
Answer:
(c) extinct

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 18 The Environment and Us

Question 20.
Food, water and clothes are the …………….. of all people.
(a) basics
(b) needs
(c) pollution
Answer:
(b) needs

Question 21.
We need to take steps to prevent the …………………. of the environment.
(a) degradation
(b) pollution
(c) conservation
Answer:
(a) degradation

Question 22.
Let us all ensure that no action on our part will cause ……………….. or cause harm to living things.
(a) conservation
(b) intervention
(c) pollution
Answer:
(c) pollution

Question 23.
Let us make all possible efforts for the …………………. of the living world.
(a) conservation
(b) degradation
(c) confrontation
Answer:
(a) conservation

Question 24.
Several projects are being implemented at the international level to …………………. the balance of nature.
(a) mountain
(b) maintain
(c) destroy
Answer:
(b) maintain

Question 25.
It is important to raise the awareness of people all over the world about the …………………. to environmental balance.
(a) threat
(b) reservation
(c) treat
Answer:
(a) threat

Question 26.
In ‘biodiversity park’, biodiversity is both preserved and ……………….. .
(a) memorized
(b) studied
(c) destroyed
Answer:
(b) studied

Question 27.
People visiting ‘biodiversity park’, enjoy being close to ……………….. .
(a) parks
(b) grass
(c) nature
Answer:
(c) nature

Question 28.
Some areas which are important for the protection and conservation of wild life are …………… for them.
(a) revered
(b) reserved
(c) protected
Answer:
(b) reserved

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 18 The Environment and Us

Question 29.
If the plants on the earth are destroyed the numbers of …………………….. also fall.
(a) humans
(b) trees
(c) animals
Answer:
(c) animals

Question 30.
If deforestation is stopped, and instead tree plantation is stepped up, animals that depend on plants will get protection and ……………………. .
(a) thrive
(b) threat
(c) deplete
Answer:
(a) thrive

Question 31.
………………… lake has formed due to a dam built on the Chand river in Satara district.
(a) Victoria
(b) Mayani
(c) Tulsi
Answer:
(b) Mayani

Question 32.
………………….. from the Siberia region in northern Asia migrate to this lake.
(a) Deer
(b) Bison
(c) Flamingos
Answer:
(c) Flamingos

Question 33.
Mayani lake has been declared a ………………… for birds.
(a) sanctuary
(b) conservatory
(c) threat
Answer:
(a) sanctuary

Question 34.
People believe that a Devrai is really a jungle reserved for ………………. .
(a) us
(b) god
(c) people
Answer:
(b) god

Question 35.
Devrais give ………………. not only to the plants but also to the animals that live there.
(a) shelter
(b) food
(c) clothing
Answer:
(a) shelter

Question 2.
State whether the following statements are True or False:

  1. Pollution of water is a threat to aquatic plants and animals.
  2. Nature provides enough for every man’s greed, but not for every man’s need.
  3. The Maldhok is also called the Great Indian Bustard.
  4. Marshy or low lying areas are filled to reclaim the land.
  5. Man is also a part of nature.

Answer:

  1. True
  2. False
  3. True
  4. True
  5. False

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 18 The Environment and Us

Name the following:

Question 1.
Two National Parks.
Answer:
Kaziranga National Park and Tadoba National Park.

Question 2.
Lake built on the Chand river in Satara.
Answer:
Mayani.

Question 3.
Birds which migrate to Asia from Siberia.
Answer:
Flamingo.

Question 4.
The biggest Maldhok sanctuary in Asia.
Answer:
Nannaj in Solapur district

Question 5.
State known for Devrais.
Answer:
Maharashtra

Question 6.
Village famous for peacock population
Answer:
Morachi Chincholi

Answer in one sentence:

Question 1.
What is a biodiversity park?
Answer:
An area which is reserved for the purpose of protecting and conserving the biodiversity of a region is called a biodiversity park.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 18 The Environment and Us

Question 2.
What are national parks?
Answer:
Some areas reserved for the protection and conservation of wildlife are called national parks.

Question 3.
What is a sanctuary?
Answer:
Certain forest areas are reserved for the protection and conservation of a particular animal or plant. It is called a sanctuary.

Question 4.
What are Devrai?
Answer:
In Indian culture, people believe that a jungle is reserved for god which is known as Devrai.

Question 5.
Which trees are commonly looked after for birds in Morachi Chincholi?
Answer:
Tamarind trees are commonly looked after for birds in Morachi Chincholi.

Question 6.
What is the population of the world?
Answer:
The population of the world is now close to six hundred crore.

Question 7.
Why is man using up more and more land and water resources?
Answer:
Man is developing new technology to meet the needs of all the people, so man is using more and more land and water resources.

Question 8.
What happens if forests are reduced?
Answer:
If forests are reduced, biodiversity is also depleted.

Question 9.
How do water sources get polluted?
Answer:
Water sources get polluted if waste water is let into them without processing.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 18 The Environment and Us

Question 10.
What happen when water from polluted sources keep soaking into the soil?
Answer:
If water from polluted sources keep soaking into the soil, the soil become infertile.

Question 11.
What happens when the proportion of carbon dioxide in the air rises?
Answer:
When the proportion of carbon dioxide in the air rises, it leads to rise in temperature.

Question 12.
How is the environmental balance disturbed?
Answer:
If one factor of the environment is damaged, its relationships with other factors also get affected. Thus the environmental balance is disturbed.

Question 13.
What steps can be taken to prevent the degradation of the environment?
Answer:
We must use our means frugally and recycle used articles, if every person practices this sincerely then we can prevent degradation of the environment.

Question 14.
What happens when deforestation is stopped and tree plantation is stepped up?
Answer:
If deforestation is stopped and instead tree plantation is stepped up, animals that depend on plants will get protection and thrive.

Question 15.
How is the Mayani lake helpful to migratory birds?
Answer:
Mayani lake homes flamingos from Siberia who migrate to this lake. Here they build nests, lay eggs and when the baby bird grows big enough they return with them to Siberia.

Question 16.
What steps has the Maharashtra State government taken to protect the Great Indian Bustard?
Answer:
Maharashtra State has declared the Nannaj area a sanctuary for Great Indian Bustard thus helping them from extinction.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 18 The Environment and Us

Question 17.
The environment is being degraded rapidly.
Answer:
(a) Man fulfil his needs by using materials from environment.
(b) All the people in the world have similar needs and desires.
(c) So, the environment is being degraded rapidly.

Question 18.
Flamingos have stopped coming to Mayani Lake.
Answer:
1. Flamingos used to migrate from Silbeia to Mayani lake to build their nests and lay eggs.
2. In the recent past, the water level in the dam has fallen.
3. Therefore, the flamingos have stopped coming to Mayani lake.

Question 19.
The Indian Bustard are the farmers’ friend.
Answer:

  1. The Indian Bustard live in open grasslands.
  2. They feed on insects thus giving protection to crops in fields.
  3. Therefore, they are the farmers’ friend.

Answer briefly:

Question 1.
Give two causes of water pollution.
Answer:
The two causes of water pollution are as follows:
1. Waste water given out from factories are let into water bodies without processing.
2. Chemical fertilizers and pesticides are used in agriculture which seep into the soil and finally flow into rivers with rainwater.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 18 The Environment and Us

Can you tell?

(A) With the help of the questions below, explain what would happen if forests are cleared on a large scale.

Question 1.
Will water and food sources for living things grow or dwindle? Why?
Answer:
If forests are cleared the amount of rain will become less and the amount of food required will dwindle.

Question 2.
Will the living things look for shelters elsewhere or stay on? Why?
Answer:
The living things will look for shelter elsewhere if forest is cleared because forest is their home.

Question 3.
Will the space occupied by the plants and animals increase or decrease? Why?
Answer:
The space occupied by the plants and animals will decrease because forest that is cleared will be used for other purpose.

Question 4.
Will the number of living things increase or decrease? Why?
Answer:
The number of living things will decrease because forest provides food, shelter and water.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 18 The Environment and Us

(B)

Question 1.
What could be the reasons of air pollution?
Answer:
The reasons of air pollution are increasing use of vehicles and growth of industries.

Question 2.
What are the different purposes for which fuels such as petrol, diesel, kerosene, natural gas, coal and wood are used?
Answer:
Petrol and diesel are used in vehicles. Kerosene is used in stoves. Natural gas is used for cooking. Coal and wood are used for burning.

Question (C)
You see a food chain in the picture above. One of the links is missing. What effect will it have on the grasshopper? On the bird? What picture should there be in the blank space? If this living thing really died out, what would be the threat to the entire living worlds? Discuss your answers in the class.
Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 18 The Environment and Us 1
Answer:
Grass is missing. If grass is not there then the number of grasshoppers will become less or even become extinct. Birds will not get enough food and become less or may even extinct.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 18 The Environment and Us

Glossary:

  1. biodiversity -variety of plant and animal life in a particular habitat
  2. deforestation – clearing/cutting of forests or trees.
  3. depleted – reduced
  4. frugally – sparingly
  5. degradation – breaking down.
  6. components – parts
  7. intervention – interference
  8. extinction – non-existence.
  9. dwindle diminish gradually.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 16 Water

Balbharti Maharashtra State Board Class 5 Environmental Studies Solutions Chapter 16 Water Notes, Textbook Exercise Important Questions and Answers.

Maharashtra State Board Class 5 EVS Solutions Part 1 Chapter 16 Water

5th Std EVS 1 Digest Chapter 16 Water Textbook Questions and Answers

1. What’s the solution?

Question 1.
Soil in the garden gets washed away with the water due to the slope of the land.
Answer:
Enough trees must be planted in the garden so that the roots of the trees will make a mesh underground holding the soil firmly, not allowing the soil to get washed away.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 16 Water

2. Use your brain power!

Question 1.
How should roads and footpaths be built to make rainwater seep into the ground?
Answer:
Use of paver stones to make roads or foot paths is a solution, as the rainwater will then be able to seep through the joints and percolate into the soil, instead of it flowing into the drains and getting wasted.

3. Answer the following questions in brief:

Question (a)
What conditions prevail during a famine?
Answer:

  1. During a famine humans and animals suffer from scarcity of water.
  2. As there is no water for agriculture, grain and fodder become scarce in the famine-stricken areas.
  3. People living in these areas have to face a lot of hardship.
  4. Animals and plants in these parts also suffer.

Question (b)
What works are undertaken to make water available even after the rainy season?
Answer:
Severals works are undertaken to make water available even after the rainy season like
1. Large dams are built.
2. Smaller reservoirs are built,
3. Contour bunding and constructing bunds on smaller streams.

Question (c)
Why is it necessary to stop rainwater?
Answer:
1. We get rain for only four months in a year. If rainwater is not stored, we will not have water for our daily needs after the rains.
2. So in order to meet the whole year’s need for water, rainwater must be stopped.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 16 Water

Question (d)
What is meant by water management?
Answer:
Taking steps to ensure that rainwater will be available even in the period after the rainy season is called water management.

4. True or False? Correct the wrong statements:

Question (a)
We get rainwater throughout the year.
Answer:
False. We get rainwater for only four months in a year.

Question (b)
During a famine, the government moves people and animals temporarily to safe places.
Answer:
True.

Environmental Studies Part 1 Standard 5th Solutions Chapter 16 Water Additional Important Questions and Answers

Fill in the blanks with the correct answers from the options given below:

Question 1.
When other substances get mixed with water, it becomes ……………… .
(a) impure
(b) pure
(c) drinkable
Answer:
(a) impure

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 16 Water

Question 2.
Some impurities …………………. in water.
(a) drown
(b) float
(c) mix
Answer:
(b) float

Question 3.
The substances that get mixed with the water are …………………. for living things.
(a) healthy
(b) pollutants
(c) harmful
Answer:
(c) harmful

Question 4.
Rivers, lakes are our ………………….. of water.
(a) clouds
(b) tanks
(c) sources
Answer:
(c) sources

Question 5.
The waste water of a city or town is collected and let into a water body at a ……………….. location.
(a) convenient
(b) busy
(c) inconvenient
Answer:
(a) convenient

Question 6.
Sewage water can carry microorganisms that spread ………………… .
(a) impurities
(b) disease
(c) pollution
Answer:
(b) disease

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 16 Water

Question 7.
Waste water from industries is more likely to contain ………………. substances.
(a) poisonous
(b) non-poisonous
(c) mineral
Answer:
(a) poisonous

Question 8.
If all this waste water is let into water bodies as ………………. it is, the water bodies become
(a) impurities
(b) polluted
(c) convenient
Answer:
(b) polluted

Question 9.
Polluted water cannot be used for ……………………. or for any other purpose.
(a) washing
(b) exercise
(c) drinking
Answer:
(c) drinking

Question 10.
Sewage and other waste water of towns and cities is …………………… for purification before letting it into a water body.
(a) processed
(b) polluted
(c) progressed
Answer:
(a) processed

Question 11.
Flowing water of rivers gets purified to some extent by …………………. processes also.
(a) artificial
(b) natural
(c) chemical
Answer:
(b) natural

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 16 Water

Question 12.
Before water is supplied to a town or city, it is …………………… .
(a) polluted
(b) solidified
(c) purified
Answer:
(c) purified

Question 13.
Places where it does not rain for a long time experience a …………………. .
(a) flood
(b) drought
(c) tsunami
Answer:
(b) drought

Question 14.
Humans and animals ……………….. from scarcity of water.
(a) suffer
(b) enjoy
(c) relax
Answer:
(a) suffer

Question 15.
Grain and fodder become ………………… during a famine.
(a) abundant
(b) scarce
(c) available
Answer:
(b) scarce

Question 16.
People living in drought have to face a lot of …………………. .
(a) hardship
(b) friendship
(c) warship
Answer:
(a) hardship

Question 17.
Fodder camps are set up in famine-stricken areas to take care of …………………. animals.
(a) wild
(b) milch
(c) domestic
Answer:
(c) domestic

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 16 Water

Question 18.
…………………. brings us water again and again.
(a) wells
(b) rain
(c) taps
Answer:
(b) rain

Question 19.
We get rain for only ……………… months in a year.
(a) six
(b) ten
(c) four
Answer:
(c) four

Question 20.
If rainwater is not …………………. we will not have water for our daily needs after the rains.
(a) stored
(b) scare
(c) evaporated
Answer:
(a) stored

Question 21.
When rainwater is stopped, it …………….. into the soil.
(a) percolates
(b) evaporates
(c) precipitates
Answer:
(a) percolates

Question 22.
As the ground water storage increase, …………………. get water.
(a) animals
(b) trees
(c) rocks
Answer:
(b) trees

Question 23.
Rainwater falling on roofs of houses in drained into large ………………. placed beside the building.
(a) boxes
(b) canals
(c) tanks
Answer:
(c) tanks

Question 24.
Taking steps to ensure that rainwater will be available even in the period after the rainy season is called …………………. management.
(a) time
(b) health
(c) water
Answer:
(c) water

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 16 Water

Answer in one sentence:

Question 1.
Where is the waste water of a city or town let out?
Answer:
The waste water of a city or town is collected and let into a water body at a convenient location.

Question 2.
What does sewage water carry?
Answer:
Sewage water carries microorganisms that spread diseases.

Question 3.
Which water contains poisonous substances?
Answer:
Waste water from industries is more likely to contain poisonous substances.

Question 4.
Why is it compulsory for factory owners to treat the water before letting it out?
Answer:
If this waste water is let into water bodies as it is then the water bodies become polluted and that is dangerous. That is why it is compulsory for factory owners to treat the water before letting it out.

Question 5.
What is a threat to aquatic living things?
Answer:
If large quantities of impurities get mixed with river water, the proportion of oxygen dissolved in the water is reduced and this is a threat to aquatic living things.

Question 6.
Why is it important to read the information when we buy a bottle of drinking water?
Answer:
The date of bottling and the period for which the water can be safely used is printed on the bottle. Therefore, it is important to read the information when we buy a bottle of drinking water.

Question 7.
Why should empty drinking water bottles be crushed and thrown into a garbage bin?
Answer:
We must crush and throw the empty drinking water bottles into a bin, so that it cannot be reused.

Question 8.
What is a famine?
Answer:
A famine is a natural disaster, where the affected area does not receive any rain, so land get dry and there is no water for humans, animals as well as agriculture.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 16 Water

Question 9.
How does the government help in increasing the groundwater storage level?
Answer:
When it is not possible to build large dams then people and government come together to build smaller reservoirs, contour bunding, constructing bunds on smaller streams or dig wells in river beds to increase the groundwater storage level.

Question 10.
How is rainwater from roof tops saved?
Answer:
Rainwater from roof tops is drained into large tanks placed besides the building thus saving rain water.

Answer the following questions in brief:

Question 1.
How does the government help famine-stricken areas?
Answer:
1. The government temporarily moves people and animals from famine-stricken areas to safe places where they can be provided with water foodgrain and fodder.
2. Fodder camps are set up to take care of domestic animals.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 16 Water

Question 2.
What happens when rainwater percolates into the soil?
Answer:
1. When the rain water percolates into the soil, the ground water storage level increases.
2. Trees get water.
3. Wells too get enough water and land can be cultivated.

Can you tell?

Question (A)
List the substances that are mixed in the waste water drained out of the kitchen and bathroom in your house.
Answer:
Shampoo, soap, washing detergents, waste food particles, oil and grease from washed utensils, dirt and grime from soiled colthes.

Water Works:

Question 1.
What source of water is used for public water supply system?
Answer:
Rainwater collected in reservoirs and lakes is used for public water supply system. Water from lakes like Tansa, Tulsi and Vihar supply water to Mumbai city.

Question 2.
What processes are used to make the water clean, transparent and germ-free?
Answer:
Filtration, purification, chlorination

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 16 Water

Question 3.
In what order are these processes carried out?
Answer:
Settling – Oxygenating – Filtration – Chlorination.

Question 4.
What is done to rid the water of bad smells?
Answer:
Alum is used in water to get rid of the bad odour.

Question (B)
If at some place, it did not rain for a very long time, what would be its effect on the life of the people there?
Answer:
Due to scarcity of water there will be drought – like condition.
The people and animals will die of thirst and hunger.
Plants and farms will wither and die therefore no food will be available. This will lead to famine.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 16 Water

Can you recall?

Question 1.
When happens when a spoonful of sugar, sawdust and soil are added to a glass of water?
Answer:
1. When sugar is added it dissolves in water.
2. When sawdust is added it does not dissolve instead it floats in water.
3. When soil is added the stones simply sink to the bottom of the glass and the soil dissolves the water making it muddy.

Question 2.
Which are the three states of water.
Answer:
1. Liquid state
2. Solid-state
3. Gaseous state.

Question 3.
What is done to make drinking water clean and safe?
Answer:
At homes, the tap water is filtered and boiled to purify it for drinking.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 16 Water

Glossary:

  1. percolates – filter gradually through a porous surface.
  2. scarcity – being in short supply
  3. fodder – food for cattle
  4. scarce – insufficient
  5. sewage – wastewater.
  6. prevail – prove more powerful
  7. grime – dirt ingrained on the surface of something
  8. soiled – made dirty
  9. transparent – clear, see-through
  10. wither – become dry and shrivelled
  11. mesh – an interlaced structure
  12. seep – flow or leak slowly

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 4 Evolution

Balbharti Maharashtra State Board Class 5 Environmental Studies Solutions Chapter 4 Evolution Notes, Textbook Exercise Important Questions and Answers.

Maharashtra State Board Class 5 EVS Solutions Part 2 Chapter 4 Evolution

5th Std EVS 2 Digest Chapter 4 Evolution Textbook Questions and Answers

1. Fill in the blank.

Question a.
The first systematic explanation of the concept of evolution was given by ………………… .
Charles Darwin
Willard Libby
Louis Leakey
Answer:
The first systematic explanation of the concept of evolution was given by Charles Darwin.

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 4 Evolution

Question b.
……………… are the most evolved animals among vertebrates
Aquatic animals
Amphibians
Mammals
Answer:
Mammals are the most evolved animals among vertebrates

2. Answer the question in one sentence.

What do we call animals which live in water and also on land?
Answer:
Amphibians live in water and also on land.

Where did the first humans appear?
Answer:
The first human appeared on the African continent.

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 4 Evolution

3. Give reasons for the following:

Question a.
The species of dinosaurs, which were enormous in size, suddenly became extinct.
Answer:
The species of dinosaurs, which were enormous in size, suddenly became extinct, because –

1. According to Darwin, the species that cannot adapt to environmental changes become extinct in the process of evolution.
2. Some sudden natural disaster or environmental change is believed to be responsible for the extinction of enormous dinosaurs.

Question b.
In the course of time, a new species with characteristics different from the original species is created.
Answer:
In the process of survival by adapting to environmental changes, certain internal physical changes occur in some species of animals.
Over a period of time, these changes become inherited characteristics seen in all subsequent generations. Thus, in the course of time, a new species with characteristics different from the original species is created.

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 4 Evolution

4. Fill in the blanks in the concept chart given below.

Question 1.
Fill in the blanks in the concept chart given below.
Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 4 Evolution 1
Answer:
Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 4 Evolution 2

Activity :

Question 1.
Make a model of a dinosaur.

Project :

Queston 1.
Collect pictures of invertebrates and vertebrates. Stick them in a notebook and write down their characteristics.

Environmental Studies Part 2 Standard 5th Solutions Chapter 4 Evolution Additional Important Questions and Answers

Fill in the blanks :

  1. The word ……… generally means a gradual and continuous change.
  2. In the process of survival by adapting to environmental changes, certain internal ……………. changes occur in some animals of a species.
  3. Sometimes during evolution, the original species becomes ………..
  4. During evolution, sometimes more than one species evolve from the ………….. species.
  5. The first systematic explanation of the concept of evolution was given by …………
  6. Species which are capable of adapting to environmental changes are able to …………
  7. Species that cannot adapt to environmental changes become ………….
  8. …………………… means a ‘terrible lizard’.
  9. Some sudden natural………………….. is believed to be responsible for the extinction of Dinosaurs.
  10. Fossils of dinosaurs with ………………… have been discovered
  11. It is supposed that some species of two legged and winged dinosaurs evolved into …………..
  12. The ……………………… organisms evolved gradually and various classes of plants and animals came into being.
  13. Animals without a backbone are called ……………
  14. Animals which have a backbone are called ……….
  15. …………………….. are animals which live in water and also on land.
  16. Animals which crawl are called ………………..
  17. A mammals baby is …………………. on the mother’s milk for some time after birth.
  18. The platypus and anteater are also considered as ……………
  19. ………………… are somewhat like humans in appearance.
  20. Apes mostly lived on ………….
  21. Some ape species that evolved give rise to ………….. species.
  22. The first human species is called the …………… man.
  23. Primitive means ………………..

Answer:

  1. evolution
  2. physical
  3. extinct
  4. original
  5. Charles Darwin
  6. survive
  7. extinct
  8. Dinosaurs
  9. disaster
  10. wings
  11. birds
  12. multicellular
  13. invertebrates
  14. Vertebrates
  15. Amphibians
  16. Reptiles
  17. fed
  18. mammals
  19. Apes
  20. trees
  21. human
  22. primitive
  23. the first

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 4 Evolution

Match the columns :

Question 1.

Column ‘A’Column ‘B’
1. Charles Darwina. a gradual and continuous change
2. Evolutionb. means ‘terrible lizard’
3. Dinosaurc. gradually evolved into plants and animals
4. Multicellulard. explained the concept of evolution
5. Invertebratese. frogs
6. Aquaticf. snake
7. Amphibiansg. cow
8. Reptilesh. snails
9. Mammalsi. fish

Answer:

Column ‘A’Column ‘B’
1. Charles Darwind. explained the concept of evolution
2. Evolutiona. a gradual and continuous change
3. Dinosaurb. means ‘terrible lizard’
4. Multicellularc. gradually evolved into plants and animals
5. Invertebratese. frogs
6. Aquatici. fish
7. Amphibianse. frogs
8. Reptilesf. snake
9. Mammalsg. cow

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 4 Evolution

Answer each question in one sentence:

Question 1.
What does evolution mean?
Answer:
Evolution means a gradual and continuous change

Question 2.
What changes occur in some species, during the process of survival?
Answer:
In the process of survival, by adapting to environmental changes, certain internal physical changes occur in some animals of a species.

Question 3.
What happens to the internal changes over a period of time?
Answer:
Over a period of time, these internal changes become inherited characteristics seen in all generations.

Question 4.
When does an original species become extinct?
Answer:
During evolution, a new species with characteristics different from the original may be created. Sometimes the original species becomes extinct.

Question 5.
Name the scientist who explained the concept of evolution.
Answer:
The first scientist to give us a systematic explanation of the concept of evolution was Charles Darwin

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 4 Evolution

Question 6.
Which species are able to survive?
Answer:
Species which are capable of adapting to environmental changes are able to survive.

Question 7.
Which species become extinct in the process of evolution?
Answer:
The species that cannot adapt to environmental changes become extinct in the process of evolution

Question 8.
What does dinosaur mean?
Answer:
Dinosaur means a ‘terrible lizard’.

Question 9.
How did the dinosaurs suddenly become extinct?
Answer:
Some sudden natural disaster or environmental change is believed to be responsible for the extinction of dinosaurs.

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 4 Evolution

Question 10.
Why do we suppose that some species of dinosaurs have evolved into birds?
Answer:
Fossils of dinosaurs with wings have been discovered. Hence, it is supposed that some species of two-legged and winged dinosaurs evolved into birds.

Question 11.
How did plants and animals come into being?
Answer:
Unicellular organisms gave rise to multicellular organisms which in turn gradually evolved into various classes of plants and animals.

Question 12.
What are invertebrates?
Answer:
Animals without a backbone are called ‘invertebrates’. For example: a snail.

Question 13.
What are vertebrates?
Answer:
Animals which have a backbone are called vertebrates. For example: A cow

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 4 Evolution

Question 14.
What do we call animals which live in water and also on land?
Answer:
Animals which live in water and also on land are called ‘Amphibians’. For example: Frog

Question 15.
What are Aquatic animals?
Answer:
Living organisms that live only in water are called ‘Aquatic animals’. For example Fish

Question 16.
What are Reptiles?
Answer:
Animals which crawl are called Reptiles. For example: Snake

Question 17.
Which species are the most evolved animals among vertebrates?
Answer:
Mammals are the most evolved animals among vertebrates.

Question 18.
Where do apes mostly live?
Answer:
Apes mostly lived on trees.

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 4 Evolution

Question 19.
How did the Human species evolve?
Answer:
Some ape species found in grasslands were forced to move around on ground. These species evolved gradually and in time gave rise to human species.

Question 20.
What is the first human species called?
Answer:
The first human species is called the ‘primitive man’.

Question 21.
What does primitive mean?
Answer:
‘Primitive’ means ‘the first’.

Question 22.
Who are Apes?
Answer:
Apes are somewhat like humans in appearance.

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 4 Evolution

Give reasons for the following :

Question 1.
In the course of time, a new species with characteristics different from the original species is created. Answer:

  1. In the process of survival by adapting to environmental changes, certain physical changes occur in some animals of a species.
  2. These internal changes become inherited characteristics in the following generations.
  3. Thus a new species with characteristics different from the original is created.

Question 2.
A frog is an amphibian.
Answer:

  1. Animals which are able to live in water and also on land are called amphibiAnswer:
  2. Therefore a frog is considered an amphibian.

Question 3.
The platypus and some species of anteaters are considered mammals.
Answer:

  1. Platypus and some species of anteaters are exceptions to the characteristics of mammals.
  2. Though they lay eggs, they suckle their young ones.
  3. Therefore, they are considered mammals.

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 4 Evolution

Answer the following questions in brief :

Question 1.
Explain the concept Evolution as stated by Charles Darwin.
Answer:

  1. Charles Darwin explained ‘evolution’ in the following manner. In the process of survival by adapting to environmental changes, certain internal physical changes occur in some animals of a species.
  2. Over a period of time, these internal changes become inherited characteristics of the following generation.
  3. Thus a new evolved species with characteristics different from the original is created
  4. Sometimes the original species become extinct.
  5. Sometimes more than one species evolve from the original one.

Question 2.
Give the characteristics of mammals.
Answer:
The characteristics of most of the mammals are as follows:

  1. Growth of the baby in the mother’s womb, sometime before birth.
  2. The baby is fed on the mother’s milk for sometime after birth.

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 4 Evolution

Question 3.
How and where did the human species evolve?
Answer:

  1. Apes are somewhat like humans in appearance
  2. They mostly lived on trees. Those species of apes which continued to live on trees retained their original ape like form.
  3. Some ape species found in grasslands were forced to move on the ground.
  4. These species evolved gradually, giving rise to the human species.
  5. This happened first on the ‘African continent’.

Question 4.
How did various classes of plants and animals come into being?
Answer:

  1. Life on earth began with unicellular organisms known as protozoa.
  2. These unicellular organisms gave rise to multicellular living things.
  3. Multicellular organisms evolved gradually and thus various classes of plants and animals came into being

Question 5.
How did birds form from dinosaurs?
Answer:

  1. Dinosaurs became extinct because of some sudden natural disaster or environmental change
  2. Fossils of dinosaurs with wings have been discovered
  3. It is thus believed that some species of two legged and winged dinosaurs evolved into birds.

Maharashtra Board Class 5 EVS Solutions Part 2 Chapter 4 Evolution

Question 6.
How many and which are the stages of evolution of animals?
Answer:
There are two stages of evolution of animals. They are:

  1. Invertebrates: These are animals without a backbone.
  2. Vertebrates: Animals which have a backbone are vertebrates. Aquatic animals, amphibians, birds, reptiles and mammals are all vertebrates.

Glossary :

  1. gradual : taking place in stages over an extended period.
  2. adapt : become adjusted to new conditions.
  3. extinction : the process on state of becoming extinct.
  4. species : group of living organisms
  5. survival : the state or fact of surviving
  6. inherited : receive or be left with something from predecessor

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 17 Clothes – Our Necessity

Balbharti Maharashtra State Board Class 5 Environmental Studies Solutions Chapter 17 Clothes – Our Necessity Notes, Textbook Exercise Important Questions and Answers.

Maharashtra State Board Class 5 EVS Solutions Part 1 Chapter 17 Clothes – Our Necessity

5th Std EVS 1 Digest Chapter 17 Clothes – Our Necessity Textbook Questions and Answers

1. Write the names of those objects in the list below that you would like to own.

Question 1.
Write the names of those objects in the list below that you would like to own.

  1. Water bottle
  2. Ball
  3. Marbles
  4. Laptop
  5. Flower pot
  6. Mobile phone
  7. Bicycle
  8. Scooter
  9. Photoframe
  10. Tiffin box

Which of these objects will you use yourself?

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 17 Clothes - Our Necessity

2. Make a note of the clothes you would choose to wear on a ‘traditional day’.

3. The names of some States are given in the table below. Write the names of the fabric or garments they are famous for.

StateFabric/Garment
Maharashtra
Gujarat
Punjab
Odisha
West Bengal
Karnataka

Environmental Studies Part 1 Standard 5th Solutions Chapter 17 Clothes – Our Necessity Additional Important Questions and Answers

Fill in the blanks with the correct answers from the options given below:

Question 1.
Wanting clothes and really ………………. them are different things.
(a) needing
(b) kneading
(c) threading
Answer:
(a) needing

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 17 Clothes - Our Necessity

Question 2.
Wanting things when we do not need them is simply ……………….., not necessity.
(a) need
(b) greed
(c) desire
Answer:
(c) desire

Question 3.
The diversity in clothes is a part of the in our country.
(a) varsity
(b) diversity
(c) city
Answer:
(b) diversity

Question 4.
During the evolution of man, his ……………… went through many changes.
(a) clothes
(b) body
(c) hairstyle
Answer:
(b) body

Question 5.
We see a variety in the ………………… used by man through the ages.
(a) clothes
(b) utensils
(c) roads
Answer:
(a) clothes

Question 6.
After man began to hunt, he wore the ………………… of animals he had killed.
(a) bones
(b) skins
(c) horns
Answer:
(b) skins

Question 7.
…………………. has given us enough to fulfill everyone’s needs.
(a) Trees
(b) Rocks
(c) Nature
Answer:
(c) Nature

Question 8.
Man must give priority to his ………………….. and not desires.
(a) needs
(b) clothing
(c) fashion
Answer:
(a) needs

Question 9.
……………….. was famous worldwide for its textile mills.
(a) Chennai
(b) Delhi
(c) Mumbai
Answer:
(c) Mumbai

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 17 Clothes - Our Necessity

Question 10.
……………… became an important hub for financial activity in India.
(a) Goa
(b) Bangalore
(c) Mumbai
Answer:
(c) Mumbai

Question 11.
The clothes worn in different regions of the country are different depending on the local …………. .
(a) climate
(b) job
(c) trends
Answer:
(a) climate

Answer in one sentence:

Question 1.
Under what conditions can attraction to clothes turn to greed.
Answer:
When we are attracted towards the clothes shown in advertisements on TV or hoardings, this attraction can turn to greed.

Question 2.
Name some sarees from different parts of India.
Answer:
Lucknow chikan, Kashmir silk, Benarasi silk, Kadiyal, Pitambari, Pochampalli, Narayanpet, Kanjivaram, Patola and Mysore silk are some types of sarees from different parts of India.

Question 3.
Why have a variety of fabrics and costumes come into use?
Answer:
A variety of fabrics and costumes have come into use due to the diverse climatic conditions in different parts of the country.

Question 4.
How have these fabrics and costumes become available in all places?
Answer:
Due to better transport facilities, these fabrics and costumes have become available in all places.

Question 5.
When can nature take care of us?
Answer:
When man gives priority to his needs and not desires, only then will nature be able to take care of us all.

Question 6.
Why did Mumbai become a big centre for textile?
Answer:
The humid weather facilitated the manufacture of long thread for making cloth. That is why, Mumbai became a big centre for textile.

Question 7.
How did Mumbai become an important hub for financial activity in India?
Answer:
The flourishing cloth industry attracted workers from all over the country who came and settled here. From then on, Mumbai became an important hub for financial activity in India.

Question 8.
Why are clothes worn in different regions of the country different?
Answer:
The clothes worn in different regions of the country are different depending on the local climate.

Answer the following in brief:

Question 1.
List some of the textile specialties of Maharashtra.
Answer:
The examples of the textiles that are the specialties of Maharashtra are:

  1. The Paithani of Paithan.
  2. Yeola, Himroo shawls of Aurangabad.
  3. Bedsheets and bed spreads from Solapur.
  4. Handloom and powerloom cloth from Ichalkaranji.

Question 2.
On evolving, why did man feel the need for clothes?
Answer:

  1. During the evolution of man, his body went through many changes.
  2. One of the prominent changes was the reduction in the amount of body hair.
  3. As a result, he began to need protection from the elements in certain weather conditions.
  4. Thus arose the need for clothes.

Question 3.
Showcase the variety in the clothing used by man through the ages.
Answer:
1. In prehistoric times, man did not find the need to wear clothes. Later he began using the bark and leaves of trees.
2. After that he began to hunt and used the skins of animals that he killed.
3. Later he learnt to make yam from materials like cotton, wool.
4. From then on he began to use cotton cloth in a variety of ways.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 17 Clothes - Our Necessity

Try this:

Question 1.
Visit people in your surroundings who often take shelter at places like railway or bus stations, brick kilns open grounds etc. Discuss the following points with them and make notes.

Question 1.
What is the total number of clothes they have?
Answer:
One pair which is worn and probably another pair if someone has been charitable to them.

Question 2.
What do they wear in summer?
Answer:
They do not have a choice, as they wear whatever is given to them, no matter the fit or how oversized it is.

Question 3.
What kind of clothes do they wear in winter?
Answer:
They wear layers of clothes one top of another just to ward off the winter as they cannot afford woollens nor have much shelter.

Question 4.
What clothes do they use during the monsoon season?
Answer:
They wear the same clothes that are available to them and mostly they cover themselves with a plastic sheet to protect themselves from rain.

Question 4.
What do they wear to functions and festivities?
Answer:
They do not get a chance to visit any function nor can they afford any festivities. If at all they go to any functions, they go as labourers or maids. So, they wear their daily clothes.

Question 5.
How many times a day do they change their clothes?
Answer:
Only once when they bathe, that too if they get water.

Question 6.
What did you realise from the activity above?
Answer:
I realise that I have too many clothes than I really require.

During a visit to textile industry obtain information about the following points:

Question 1.
What industry is this?
Answer:
Cottage industry/ smaH scale industry

Question 2.
What is the product of this industry?
Answer:
They are producing cloth.

Question 3.
What raw material is used to produce this fabric?
Answer:
Cotton bales and yams of thread is used to produce this fabric.

Question 4.
From where does this raw material come?
Answer:
From the farms in the nearby areas.

Question 5.
In what form is the raw material obtained?
Answer:
The raw material is obtained in the form of cotton.

Question 6.
Where is the finished product sent for sale?
Answer:
The finished product is sent to local and retail shops.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 17 Clothes - Our Necessity

Question 7.
In which season are these textiles mainly used?
Answer:
These textiles are mainly used in monsoon and winter i.e. when the climate is humid.

Question 8.
What kinds of workers are needed for this industry?
Answer:
People with little or no education, but highly skilled to do their job.

Question 9.
Where do these workers come from?
Answer:
These workers come from remote villages in search of job in cities or from areas nearby the industry.

Question 10.
In what way have centres of textile industry changed since the olden days?
Answer:
Early days they had machines run by man power. Nowadays, every machine is run on electric power and production is swift and efficient.

Question 11.
What problems are encountered in this industry?
Answer:
It is difficult to get skilled labourers who will work honestly for long hours for a very miserable salary.

3. To find out more about the different varieties of clothes, visit a clothes market with your parents. Discuss the points given below, with the people there and make notes.

Question 1.
Look at the variety of clothes and make a list of their names.
Answer:
Salwar Kameez, saree, trousers, jeans, T-shirts, formar and informal shirts, dresses, skirts, tops, shorts etc.

Question 2.
Which of these are meant only for children, for adults or for aged people?
Answer:
For children – Shorts, skirts, tops, t-shirts, jeans
For adults – Trousers, shirts, jeans, tops, sarees etc.
For aged people – Sarees, salwar kurta, dhoti, shirts etc.

Question 3.
Find out about the various types of sarees.
Answer:
Lucknow chikan, Kashmir silk, Benarasi silk, Kadiyal, Pitambari, Pochampalli, Narayanpet, Kanjivaram, Patola, Mysore silk etc.

Question 4.
Note down the names of places famous for their sarees.
Answer:
Paithan, Lucknow, Benaras, Kashmir, Kamatak etc.

Talk to the elderly people in your family or locality to obtain this information.

Question 1.
What clothes did they wear during their childhood? Make a list of the clothes they name.
Answer:
Frock for girls and shorts and shirt for boys.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 17 Clothes - Our Necessity

Question 2.
Take the list to a cloth/garment shop and see which of these clothes in your list are available there.
Answer:
It will be available in very few shops.

Question 3.
Find out which of the clothes are not worn any more.
Answer:
Half saree, Pawdaa, Lungi, Dhoti, Lugda etc.

Question 4.
Find out the places where these clothes used to come from.
Answer:
These clothes come from different states of India.

Question 5.
Find out why these clothes went out of use.
Answer:
People in urban areas mostly wear western clothes so they do not find these clothes trendy any more.

Maharashtra Board Class 5 EVS Solutions Part 1 Chapter 17 Clothes - Our Necessity

Glossary:

1. hub – the effective centre of an activity.
2. facilitated – made easy or easier
3. kilns – furnaces or ovens for making bricks.