Biology · Geography

Population Dynamics

940 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

Demographic features of developing countries are

  1. high infant mortality, low fertility, young age

  2. high fertility, high density, high mortality rate and young age distribution

  3. high fertility, falling mortality rate, rapid population growth and young age distribution

  4. high density, high mortality, uneven population growth and very old age distribution
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Developing countries typically exhibit high fertility rates, declining mortality rates due to improved healthcare, rapid population growth, and a large proportion of young people.

Multiple choice

Human population generally have tendency for which of the following types of mating?

  1. Random mating

  2. Negative assortative mating

  3. Positive assortative mating

  4. Zero assortative mating
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

People most often select mates who are similar to themselves in terms of traits that can be readily observed and discriminated. For instance, tall people usually mate with tall people. Genotypically similar people more often mate with each other.

Multiple choice

Directions: For the Assertion (A) and Reason (R) below, choose the correct alternative.   Assertion (A): Life expectancy at birth in India is 67.8 years. Reason (R): Death rate in India is 7.4 per 1,000 population.

  1. A is true, R is false.

  2. A is false, R is true.

  3. Both A and R are true, but R is not the correct explanation of A.

  4. Both A and R are true and R is the correct explanation of A.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Both A and R are true, but R is not the correct explanation of A.

Multiple choice

Which of the following explains the Late Expanding Phase of Demographic Theory ?

  1. High Birth Rate and High Death Rate

  2. High Birth Rate and Declining Death Rate

  3. Declining Birth Rate and Declining Death Rate

  4. Low Birth Rate and Low Death Rate

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The Demographic Transition Model's 'Late Expanding' phase (Stage 3) is characterized by a declining birth rate and a death rate that continues to decline but at a slower pace.

Multiple choice

The ‘Year of Great Divide’ in Indian demography was

  1. 1951

  2. 1901

  3. 1921

  4. 1981
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The ‘Year of Great Divide’ in Indian demography was 1921. In India, it marked the start of consistent population growth as revealed by the census, after decades of alternating growth and contraction or stagnation. In fact, the change dates from 1920 with the passing of the influenza pandemic.

Multiple choice statistics time series moving average and variation simple moving average

Ayushi used the data from a scatterplot to determine a regression model showing the relationship between the population in the area where she lived and the number of years, $x$, after she was born. The result was an exponential growth equation of the form $y={x} _{0}{\left(1+r\right)}^{x}$. Then ${x} _{0}$ most likely represents

  1. The population in the year that she was born

  2. The rate of change of the population over time

  3. The maximum population reached during her lifetime

  4. The number of years after her birth when the population reached its maximum
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In the exponential growth model y = x0(1+r)^x, x0 represents the initial value when x = 0. Since x is the number of years after birth, x = 0 corresponds to the year of birth.