Selina solutions for कन्साइस बायोलॉजी [अंग्रेजी] कक्षा १० आईसीएसई chapter 15 - Population: The increasing numbers and rising problems [Latest edition]

Name the three great cultural revolutions that favoured a steep rise in population.

Mention two areas of medical sciences which have indirectly contributed to high growth in human population.

Is the present day human population growth following a J-shaped curve or S-shaped curve?

Write any six factors which have contributed to a rapid rise of human population in recent times in the world.

Give the approximate figures for the population in India in million at the beginning of twentieth century.

Give the approximate figures for the population in India in million at the end of twentieth century.

Urbanisation is the enlargement of towns covering a very large area together with modern facilities.

Rising population is leading to an increased coverage of land for raising forests.

Coal and iron are inexhaustible resources.

Public conveyances like buses and railways are ______.

Many sets of garments per member in a family is ______.

Petroleum is a resource of the same category as that of ______.

Give Technical Terms: A statistical study of human population of a region.

Give the technical terms for the following:

Number of deaths per 1000 people per year.

Give the technical terms for the following:

Number of individuals per sq. km. at any given time.

Give Technical Terms: The technical term used for the difference between birth rate and death rate in population.

List any three consequences of high population density.

List any five major disadvantages of having large families.

What are the age restrictions for marriage for boys and girls respectively in India?

What are the three aspects covered under family welfare?

Some vitamin preparations prevent the release of the egg from the ovary.

Use of a condom for contraception is a barrier method.

IUDs prevent implantation of embryo in vagina.

Tubectomy is performed on females.

Write the full form of MTP.

In what circumstances is MTP recommended?

The statistical study of human population is ___________.

Surgical method of sterilization in women involves cutting and tying of ______.

When the number of individuals added to the population exceeds the number of individuals lost, there is ______.

The symbol of family welfare is ______.

Death rate is the number of deaths ______.

What was directly responsible for the rapid rise of world population in the twentieth century?

Which of the following is not a non-conventional source of energy?

Birth rate is technically termed as ______.

Which of the following is an exhaustible source of energy?

What are the age restrictions for marriage by law for boys and girls in india?

Assertion (A): Population density is the number of individuals in an area of 100 square kilometers per year.

Reason (R): Population density gives us an idea of all the living organisms of different species in a particular area every year.

1. A is True and R is False.
2. A is False and R is True.
3. Both A and R are True.
4. Both A and R are False.

Assertion (A): Tubectomy is a temporary method of contraception for males in which the sperm ducts are cut and ligated with a nylon thread. 

Reason (R): Tubectomy closes the passage of the sperms. The sperm duct is also known as vas deferens, which stores the sperms for some days during which they mature and become motile.

1. A is True and R is False.
2. A is False and R is True.
3. Both A and R are True.
4. Both A and R are False.

Assertion (A): Fossil fuels are renewable and non-conventional sources of energy.

Reason (R): The underground reserves of coal and petroleum are depleting fast. People should look at other non-conventional sources of energy like solar energy, tidal energy, etc. for their use.

1. A is True and R is False.
2. A is False and R is True.
3. Both A and R are True.
4. Both A and R are False.

Give the technical term for the statistical study of human population of a region.

Name two surgical techniques (one for the human male and another for the human female) that can be used to prevent pregnancy.

Vasectomy is the surgical method of sterilisation in human males.

Tubectomy is the placing of a diaphragm on the cervix.

Cow was the first domesticated animal.

Rapidly growing industries favoured population rise

Present human population growth is following arithmetic progression.

Birth rate (natality) is the number of live births per hundred people of population per decade.

Tubectomy is a popular surgical method of contraception in human males.

List three major landmarks in human history which contributed to the sudden rise in population of the world.

Sterilisation in men means preventing the flow of sperms into the seminal vesicles by cutting and ligating the vas deferens. Can there be a corresponding operation made in women? If yes, where?

Write the full form of the following abbreviation:

IUDs

Write the full form of the following abbreviation:

MTP

Explain briefly the relationship between poverty and population and how one affects the other.

Mention two reasons for the rapid increase of population in India.

Match the terms given in column A with those in column B.

Given below is a set of paired terms. The first pair indicates the relationship between the two terms. Rewrite and complete the second pair on a similar basis.

Death rate : Mortality :: Birth rate : ______.

Given below is a set of paired terms. The first pair indicates the relationship between the two terms. Rewrite and complete the second pair on a similar basis.

Tubectomy : Oviduct :: Vasectomy : ______.

Given below is a set of paired terms. The first pair indicates the relationship between the two terms. Rewrite and complete the second pair on a similar basis.

Intrauterine device : Copper-T :: Oral pills : ______.

Given below is a set of paired terms. The first pair indicates the relationship between the two terms. Rewrite and complete the second pair on a similar basis.

Barrier method : Diaphragms :: Surgical method : ______.

Given below is a set of paired terms. The first pair indicates the relationship between the two terms. Rewrite and complete the second pair on a similar basis.

Cutting down of forests : Deforestation :: Planting more trees : ______.

Define the following term:

Population

Define the following term:

Population density

Define the following term:

Demography

Define the following term:

Resources

Define the following term:

Growth rate of population

Distinguish between the following pair:

Exhaustible and Inexhaustible resources.

Distinguish between the following pair:

Conventional and Non-conventional sources of energy.

Distinguish between the following pair:

Natality and Mortality.

Distinguish between the following pair:

Tubectomy and Vasectomy.

Distinguish between the following pair:

Deforestation and Afforestation.

What do you mean by the 3Rs in the context of sustainable development?

Our resources cannot keep pace with the rising population. Give three examples in support of this statement.

How can the knowledge of the process of reproduction help people in limiting the size of their families? Give two concrete examples.

What is the idea behind the phrase “population explosion”?

Given below are hypothetical figures in regard to population (in crores) of two countries A and B during the last three decades.

Fill in the blanks:

1. Rate of growth of population of country ______ has declined between years ______ and ______.
2. The country ______ shows negative population growth between years ______ shows negative population growth between years ______.
3. The country ______ shows zero population growth between years ______ and ______.

Observe the diagrams (A) and (B) given below and answer the following questions.

1. Label the parts 1 to 5.
2. What does figure A depict?
3. What does figure B depict?
4. Comment on P and Q.
5. Mention one function each of part 2 and 4.

Kishan and Malti are married and have three children. They have decided not to have any more children and are considering permanent surgical methods of contraception.

1. Which surgical method can Kishan undergo?
2. Can Malti also undergo some sort of a permanent surgical method like Kishan as answered by you in (a)?
3. Out of(a) and (b), explain why (a) is preferred over (b) when considering permanent contraception?

Rising population is one of the major issues that India is facing currently. It has adversely impacted the environment as well as food production capacity. Answer the questions that follow:

1. Mention two main factors responsible for population explosion.
2. ‘It is the need of the hour to adopt population control measures’. Give two reasons to substantiate the above statement.
3. Mention two Intro Uterine Devices (IUDs) that are commonly used for contraception in India.