Question 1

Which of the following best describes a Type III survivorship curve, as shown in the provided graph?

Accepted Answer

There is low survivorship at early age intervals, with few individuals reaching old age.

Question 2

Based on the age structure diagrams for Mexico in 1990 and the United States in 2040, which statement is most accurate?

Accepted Answer

Mexico's population in 1990 is likely to experience rapid growth due to a wide base of young individuals.

Question 3

Which of the following equations represents exponential population growth?

Accepted Answer

$$N_{t+1} = N_t + rN_t$$

Question 4

A population of rabbits is introduced to an island with unlimited resources. Which growth model would best describe their population increase?

Accepted Answer

Exponential growth model

Question 5

Which of the following is a density-dependent factor that can regulate population growth?

Accepted Answer

A disease that spreads more easily in crowded populations

Question 6

In an experiment testing the effect of fertilizer on plant growth, which is the dependent variable?

Accepted Answer

The growth of the plants measured in height or mass

Question 7

Which of the following statements about scientific theories is correct?

Accepted Answer

A theory is a well-supported explanation based on a body of evidence.

Question 8

Which of the following best describes the role of nucleic acids in cells?

Accepted Answer

They store and transmit genetic information for protein production.

Question 9

Which of the following is a characteristic of prokaryotic cells?

Accepted Answer

They lack a nucleus.

Question 10

Which of the following is an example of passive transport across a cell membrane?

Accepted Answer

Diffusion of oxygen from high to low concentration

Question 11

Which of the following best explains why invasive species often become problematic in new environments?

Accepted Answer

They often lack natural predators and have opportunistic life histories.

Question 12

Which of the following is a real-world example of a density-independent factor affecting a population?

Accepted Answer

A drought reducing water availability for all individuals

Question 13

Which of the following best describes the concept of carrying capacity ($$K) in $$the logistic growth model?

Accepted Answer

The maximum number of individuals an environment can support indefinitely

Question 14

Which of the following is a likely consequence of a population with a large proportion of individuals in the 0–14 age group?

Accepted Answer

The population will likely experience continued growth as these individuals reach reproductive age.

Question 15

Which of the following is an example of an abiotic factor affecting the diversity of organisms in an ecosystem?

Accepted Answer

Soil pH and temperature

Question 16

Which of the following best describes the process of biological control in pest management?

Accepted Answer

Introducing a natural enemy to reduce pest populations

Question 17

Which of the following is a potential risk of using biological control agents?

Accepted Answer

They may become invasive themselves and disrupt native ecosystems.

Question 18

Which of the following best describes the ecological footprint of a nation?

Accepted Answer

The amount of land and water needed to produce the resources used by its population

Question 19

Which of the following is a mechanism of speciation?

Accepted Answer

Reproductive isolation leading to genetic divergence

Question 20

Which of the following best summarizes Darwin’s theory of evolution by natural selection?

Accepted Answer

Individuals with advantageous traits are more likely to survive and reproduce, passing those traits to offspring.

Population Ecology: Concepts, Models, and Applications

Study Guide - Practice Questions