Biology · Geography

Population Dynamics

978 Questions

Explore key concepts in population dynamics through these practice questions. The focus is on demographic transition models, population pyramids, and life history theory. These topics are useful for general studies and biology exams.

Demographic transition theoryPopulation pyramidsMathematical growth modelsLife history theory

Population Dynamics Questions

Multiple choice

1921 is called the year of the great divide because

  1. death rate decreased

  2. life expectancy increased and death rate also increased

  3. birth rate decreased

  4. birth rate remained high and death rate decreased

  5. birth rate decreased and death rate also decreased
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct answer as due to improved medical facilities, death rate decreased but birth rate remained high.

Multiple choice

Which of the following is correct about national health?

  1. Death rates have increased as the aged population has grown.

  2. Birth rates have decreased as life expectancy has increased.

  3. The per capita calorie consumption has increased after agricultural revolution.

  4. Safe drinking water and basic sanitation amenities are now available to a large percentage of population.

  5. There is now prevention of infectious diseases and modern medical practices in diagnosis and treatment of ailments.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is correct as lately there has been an improvement in public health, prevention of infectious diseases and application of modern medical practices in diagnosis and treatment of ailments.

Multiple choice

Which of the following are the reasons for population explosion in India?

a. Decline in death rate b. Increase in maternal mortality rate c. Decline in infant mortality rate d. Increase in the number of people in reproductive age

  1. Only a and b

  2. Only a, b and c

  3. Only b and c

  4. Only b and d

  5. Only a, c and d
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option. Decline in death rate, decline in infant mortality rate and increase in the number of people in reproductive age are the reasons for population explosion in India.

Multiple choice

Which of the following steps was/were taken by the government to check the population growth rate?

a. Motivating families to use various contraceptive methods b. Statutory raising of marriageable age c. Giving incentives to couples with smaller families

  1. only a

  2. only a and b

  3. only b

  4. only b and c

  5. a, b and c
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option as all of the above steps were taken by the government to check the population growth rate.

Multiple choice

According to the latest census figures, sex ratio in India is

  1. declining

  2. stable

  3. increasing

  4. fluctuating
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In the 1981 census, the sex ratio in India was 934. By 1991, it had declined to 927 per 1000 men. In 2001 census, it rose to 933. This shows that it keeps on fluctuating, depending upon various factors.

Multiple choice

Growth in living things is

  1. permanent and irreversible

  2. temporary and irreversible

  3. permanent and reversible

  4. temporary and reversible
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Growth in living things is permanent and irreversible.

Multiple choice

The present demographic transition of India is indicative of

  1. High population growth potential but low actual growth

  2. High population growth potential and high actual growth

  3. Partial industrialized economy

  4. Typically increasing urbanization
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

India's demographic transition shows declining birth rates and death rates typical of development, with urbanization being a key driver. High potential + high actual growth (B) describes an earlier phase. Partial industrialization (C) is not a demographic indicator. Urbanization increases as societies develop through the demographic transition.

Multiple choice

Which of the following cause(s) can be attributed to the decline of population in India between 1911 and 1921?

  1. Several natural hazards
  2. Preventive checks
  3. International migration
  4. Epidemics Select the correct answer using the codes given below:

  1. 1 and 2

  2. 4 alone

  3. 2 alone

  4. 1 and 3
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The population decline between 1911-1921 was primarily caused by epidemics, most notably the Spanish influenza pandemic of 1918-1919, which killed millions. Natural hazards occurred but were not the primary cause of the decade's decline. Preventive checks (birth control) were minimal in that era. International migration was not significant enough to cause net decline. The 1911-1921 period is unique in Indian census history as the only decade with negative growth, attributable almost entirely to disease outbreaks.

Multiple choice

Population explosion is associated with

  1. high birth rate and low death rate

  2. high birth rate and high death rate

  3. low birth rate and high death rate

  4. low birth rate and low death rate
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Population explosion occurs when there's a high birth rate combined with a low death rate, creating a large positive natural increase. This happens during the demographic transition when death rates decline due to better healthcare, sanitation, and nutrition, but birth rates remain high.

Multiple choice

The term 'demographic dividend' applies to

  1. declining total fertility rate

  2. declining crude birth rate

  3. young population and a declining dependency ratio

  4. increasing life expectancy at birth of females only
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Demographic dividend refers to the economic growth potential that arises when a country has a young, working-age population combined with a declining dependency ratio (fewer children and elderly relative to workers). This creates a window for accelerated economic growth if the young population is productively employed.

Multiple choice

Recent human population growth is attributed to

A. agricultural revolution B. genetic drift C. industrial revolution D. medical advances E. altruistic behavior

  1. A, C, D and E

  2. B and E

  3. A, B, C and D

  4. D and E
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

 Agricultural revolution has helped mankind with new varieties of plants and biofertilisers. Industrial revolution has given us lot of job opportunities by increasing the per capita income. Medical advances have increased our life span. Man is helping the society through his altruistic approach (to help others).