Question 1

Which of the following best describes the process of natural selection as outlined by Darwin?

Accepted Answer

Organisms with advantageous traits are more likely to survive and reproduce, passing those traits to the next generation.

Question 2

Which of the following is NOT one of the four essential components of natural selection?

Accepted Answer

All individuals in a population survive and reproduce equally.

Question 3

Which of the following statements best explains why mitochondria and chloroplasts are considered evidence for the endosymbiotic theory?

Accepted Answer

They contain their own DNA and reproduce independently within the cell.

Question 4

Which of the following is an example of a vestigial structure in humans?

Accepted Answer

The appendix

Question 5

Which of the following best describes the role of cyanobacteria in Earth’s history?

Accepted Answer

They were responsible for the initial oxygenation of Earth’s atmosphere through photosynthesis.

Question 6

Which of the following equations correctly represents the process of photosynthesis?

Accepted Answer

$$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6$ + 6O_2$$

Question 7

Which of the following is a defining feature of animals with open circulatory systems?

Accepted Answer

Hemolymph bathes organs directly in an open cavity.

Question 8

Which of the following best describes the difference between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have a nucleus; prokaryotic cells do not.

Question 9

Which of the following is an example of a density-dependent factor affecting population growth?

Accepted Answer

A disease spreading more rapidly as population density increases

Question 10

Which of the following best describes the competitive exclusion principle?

Accepted Answer

No two species can occupy the same niche in the same habitat at the same time.

Question 11

Which of the following is a correct sequence for the flow of energy through a typical food web?

Accepted Answer

Producers $$\rightarrow$$ Primary consumers $$\rightarrow$$ Secondary consumers $$\rightarrow$$ Decomposers

Question 12

Which of the following is a real-world example of mutualism?

Accepted Answer

Bees pollinating flowers while collecting nectar

Question 13

Which of the following best describes the function of mycorrhizal fungi in ecosystems?

Accepted Answer

They form mutualistic relationships with plant roots, aiding in nutrient absorption.

Question 14

Which of the following is a correct description of the nitrogen cycle?

Accepted Answer

Nitrogen is fixed by bacteria, taken up by plants, transferred to animals, and returned to the atmosphere by decomposers.

Question 15

Which of the following is an example of a keystone species?

Accepted Answer

Sea otters maintaining kelp forest ecosystems by preying on sea urchins

Question 16

Which of the following best describes the difference between primary and secondary succession?

Accepted Answer

Primary succession occurs on newly formed land without soil; secondary succession occurs where soil is already present.

Question 17

Which of the following is a correct equation for aerobic cellular respiration?

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 ightarrow 6CO_2 + 6H_2O + 	ext{energy}$$

Question 18

Which of the following is a plausible explanation for why amphibians are considered indicator species in many ecosystems?

Accepted Answer

Their permeable skin makes them sensitive to pollutants and environmental changes.

Question 19

Which of the following best describes the process of biomagnification?

Accepted Answer

The increase in concentration of toxins as they move up the food chain.

Question 20

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

Accepted Answer

A flood wiping out a population of mice

General Biology II Final Exam Study Guide – Comprehensive Review

Study Guide - Practice Questions