Question 1

Which of the following best describes the difference between allopatric and sympatric speciation?

Accepted Answer

Allopatric speciation requires a physical barrier that separates populations, while sympatric speciation occurs within the same geographic area.

Question 2

A population of beetles is exposed to a pesticide. After several generations, most beetles are resistant to the pesticide. Which evolutionary mechanism best explains this change?

Accepted Answer

Natural selection

Question 3

Which of the following is an example of a postzygotic reproductive barrier?

Accepted Answer

Hybrid sterility

Question 4

Which equation would you use to calculate the expected genotype frequencies in a population under Hardy-Weinberg equilibrium?

Accepted Answer

$$p^2 + 2pq$$ + $$q^2 = 1$

Question 5

Which of the following is NOT an abiotic factor that can influence the distribution of organisms in a biome?

Accepted Answer

Predation

Question 6

A population of rabbits shows the following genotype frequencies: 0.36 AA, 0.48 Aa, and 0.16 aa. What are the allele frequencies for A and a?

Accepted Answer

$$A = 0.6,\ a = 0.4$$

Question 7

Which of the following best describes the role of a keystone species in an ecosystem?

Accepted Answer

A species whose removal causes a significant impact on the structure of the community.

Question 8

Which of the following is an example of mutualism?

Accepted Answer

Bees pollinating flowers while collecting nectar

Question 9

Which of the following human activities is most directly associated with biological magnification?

Accepted Answer

Release of persistent pesticides into the environment

Question 10

Which of the following best explains why invasive species can disrupt native ecosystems?

Accepted Answer

They often lack natural predators in the new environment.

Question 11

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

Accepted Answer

Disease

Question 12

Which of the following is the correct sequence of trophic levels in a typical food chain?

Accepted Answer

Producer → Primary consumer → Secondary consumer → Tertiary consumer

Question 13

Which of the following best describes the concept of sustainable development?

Accepted Answer

Development that meets the needs of the present without compromising the ability of future generations to meet their own needs.

Question 14

Which of the following is an example of behavioral isolation as a prezygotic reproductive barrier?

Accepted Answer

Two species of birds have different mating songs.

Question 15

Which of the following is a consequence of habitat loss?

Accepted Answer

Decreased species diversity

Question 16

Which of the following best describes the process of secondary succession?

Accepted Answer

Succession that occurs in an area where a disturbance has destroyed an existing community but left the soil intact

Question 17

Which of the following is a correct statement about exponential population growth?

Accepted Answer

It occurs when resources are unlimited and is described by the equation $$dN/dt = rN$$

Question 18

Which of the following is an example of commensalism?

Accepted Answer

Barnacles attaching to a whale

Question 19

Which of the following best describes the greenhouse effect?

Accepted Answer

The trapping of heat by atmospheric gases such as carbon dioxide, leading to increased global temperatures.

Question 20

Which of the following is a likely result of overharvesting in a fish population?

Accepted Answer

Population decline and possible extinction

General Biology Study Guide: Evolution, Ecology, Communities, and Conservation

Study Guide - Practice Questions

Study Guide - Flashcards