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

Describe a graph of what happens over time in a population where a disease is spreading.

  1. Number of people increases and then goes back down

  2. Number of people starts at maximum and goes down to 0

  3. Number of people starts at 0 and continues to increase

  4. Number of people starts at maximum, goes down and back up
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When a disease spreads through a population, the number of infected individuals typically rises as the disease transmits, peaks, and then declines as people recover or become immune.

Multiple choice

A change is demographic is an example of which type of external factor?

  1. Political

  2. Economic

  3. Social

  4. Technological
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Demographics refer to the characteristics of a human population, such as age, gender, and income. In a PESTEL analysis, changes in these population characteristics are classified as social factors because they influence consumer behavior and lifestyle trends.

Multiple choice economics theories of employment and income measures to alleviate unemployment unemployment measures unemployment and employment generation

Population growth at a high rate reduces employment opportunities and slows down capital formation (True or False).

  1. True

  2. False

  3. Can't say

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Rapid population growth increases the labor supply at a rate faster than the economy can generate new jobs, which exacerbates unemployment. Additionally, a larger population increases consumption demands, which reduces overall savings and slows down the rate of capital formation.

Multiple choice economics theories of employment and income measures to alleviate unemployment unemployment measures unemployment and employment generation

Arguments in favour of high growth in population are _______.

  1. it provides work force to produce and market for the product.

  2. it may promote innovative ideas.

  3. it may promote division of labour and specialization.

  4. all of the above.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Proponents of population growth argue that a larger population provides a robust workforce and a larger domestic market for goods. It can also drive innovation through a wider pool of talent and encourage the division of labor and specialization. Thus, all of these points represent arguments in favor of high population growth.

Multiple choice economics theories of employment and income measures to alleviate unemployment unemployment measures unemployment and employment generation

Which of the following statements is true about Indian Death rate and Birth rate?

  1. In India, death rate is falling but birth rate is also falling.

  2. In India, death rate is increasing but birth rate is also increasing.

  3. In India, death rate is falling but birth rate is not falling.

  4. In India death rate is falling but birth rate has remained constant over the years.
Reveal answer Fill a bubble to check yourself
C Correct answer
Multiple choice economics theories of employment and income measures to alleviate unemployment unemployment measures unemployment and employment generation

Population growth at a high rate reduces employment opportunities and slows down capital formation (True or False) 

  1. True

  2. False

  3. Can't say

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Rapid population growth increases the supply of labor faster than the rate of job creation, which reduces employment opportunities. Additionally, a high dependency ratio increases consumption and reduces savings, thereby slowing down capital formation.

Multiple choice

What does doubling time mean? 

  1. there is improved healthcare

  2. there are fewer people of childbearing age

  3. the time it will take for a country to double in size

  4. there are more infants and children than adults
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Doubling time is the projected period of time required for a population to double in size, based on its current constant growth rate.

Multiple choice

Which describes zero population growth? (Zero meaning the population isn’t growing)

  1. birthrate is higher than death rate by zero percent

  2. birthrate is higher than death rate by 60 percent

  3. death rate is higher than birthrate by 30 percent
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Zero population growth occurs when the birth rate equals the death rate, meaning the net difference between births and deaths is exactly zero percent, resulting in a stable population size.

Multiple choice

How do you calculate population change?

  1. (births + immigration) - (deaths + emigration)

  2. (births + deaths) - (immigration + emigration)

  3. (births + immigration) +(deaths + emigration)

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Population change is determined by adding the factors that increase a population (births and immigration) and subtracting the factors that decrease it (deaths and emigration). This balance determines whether a population grows, shrinks, or remains stable.

Multiple choice

What will happen if we exceed the carrying capacity?

  1. Mortality rates increase while birth rates decrease.

  2. Birth rates increase while Mortality rates decrease.

  3. Both mortality and birth rates will decrease.

  4. Nothing happens.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When a population exceeds its carrying capacity, resources such as food, water, and shelter become scarce. This depletion leads to increased mortality rates due to starvation or disease, while birth rates simultaneously decrease due to stress and lack of energy.

Multiple choice

If any of the limiting factors change, animal and plant populations can..

  1. can both increase and decrease

  2. increase

  3. decrease

  4. stay the same
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Limiting factors, such as food availability, water, and predation, dictate the carrying capacity of an ecosystem. If these factors change favorably, populations can increase; if they change unfavorably, populations will decrease.

Multiple choice

World population is increasing at which of the following rates?

  1. 1 billion per decade

  2. 2 billion per decade

  3. 1 billion every 5 years

  4. 2 billion every 5 years
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Historically, the world population has been growing by approximately 1 billion people every 11 to 12 years, which is roughly 1 billion per decade. For example, the global population reached 7 billion in 2011 and 8 billion in late 2022.