Question 1

Which of the following best describes the difference between a food chain and a food web?

Accepted Answer

A food chain represents a single pathway of energy flow, whereas a food web illustrates multiple interconnected pathways.

Question 2

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

Accepted Answer

A contagious disease spreading more rapidly as population density increases.

Question 3

A scientist is testing the effect of fertilizer on plant growth. She sets up two groups: one receives fertilizer, the other does not. What is the independent variable in this experiment?

Accepted Answer

The presence or absence of fertilizer.

Question 4

Which equation best represents exponential population growth?

Accepted Answer

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

Question 5

Which of the following is a primary consumer in a freshwater pond ecosystem?

Accepted Answer

Zooplankton

Question 6

A population of turtles is affected by global warming, resulting in a skewed sex ratio. Which biological concept does this scenario best illustrate?

Accepted Answer

Abiotic factors influencing population demographics

Question 7

Which of the following statements about keystone species is correct?

Accepted Answer

Removal of a keystone species can cause dramatic changes in ecosystem structure and function.

Question 8

Which process is primarily responsible for the transfer of energy from primary producers to primary consumers in an ecosystem?

Accepted Answer

Herbivory

Question 9

Which of the following best describes the concept of carrying capacity ($$K) in $$population ecology?

Accepted Answer

The maximum number of individuals that can be supported indefinitely by the available resources in an environment.

Question 10

Which of the following is a correct statement about logistic growth?

Accepted Answer

Population growth slows as the population approaches carrying capacity.

Question 11

Which of the following is an example of mutualism?

Accepted Answer

Bees pollinating flowers while obtaining nectar.

Question 12

Which of the following best explains why the scientific process must be flexible?

Accepted Answer

Because scientific inquiry often requires adapting to new evidence and revising hypotheses.

Question 13

Which of the following is a biotic factor that can influence population density?

Accepted Answer

Predation

Question 14

Which of the following is a correct description of a survivorship curve?

Accepted Answer

A graph showing the number of individuals surviving at each age for a given species.

Question 15

Which of the following is a correct statement about ecological succession?

Accepted Answer

Secondary succession occurs after a disturbance in an area where the soil remains intact.

Question 16

Which of the following best describes the role of decomposers in an ecosystem?

Accepted Answer

They break down dead organic matter, recycling nutrients back into the ecosystem.

Question 17

Which of the following is a correct statement about the nitrogen cycle?

Accepted Answer

Nitrogen is fixed by certain bacteria into forms usable by plants.

Question 18

Which of the following is a correct use of a compound microscope?

Accepted Answer

Observing thin sections of tissues at high magnification.

Question 19

Which of the following is an example of resource partitioning?

Accepted Answer

Two lizard species using different parts of a tree to avoid competition.

Question 20

Which of the following best explains the competitive exclusion principle?

Accepted Answer

Two species with identical niches cannot coexist indefinitely in the same habitat.

General Biology Study Guide: Ecology, Scientific Inquiry, and Data Analysis

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