Question 1

Which type of interaction is illustrated by the relationship between clownfish and sea anemones, as seen in the first image?

Accepted Answer

Mutualism

Question 2

The graph showing population densities of Paramecium aurelia and Paramecium caudatum in combined cultures demonstrates which ecological principle?

Accepted Answer

Competitive exclusion principle

Question 3

In the warbler images, each species feeds in a different part of the tree. This is an example of:

Accepted Answer

Resource partitioning

Question 4

Which of the following best describes a fundamental niche?

Accepted Answer

The potential area a species could occupy without competition

Question 5

A harmless snake mimics the coloration of a venomous snake. This is an example of:

Accepted Answer

Batesian mimicry

Question 6

Which defense mechanism is illustrated by the frog with bright coloration?

Accepted Answer

Aposematic coloration

Question 7

If a top predator is removed from a community, what is the likely effect according to the concept of trophic cascade?

Accepted Answer

Increase in prey population and decrease in lower trophic levels

Question 8

Which species is most likely to be considered a keystone species?

Accepted Answer

A species whose impact is disproportionately large relative to its abundance

Question 9

What is the main difference between primary and secondary succession?

Accepted Answer

Secondary succession occurs where soil remains after disturbance

Question 10

Which equation best represents the logistic growth of a population, as seen in the Paramecium graph?

Accepted Answer

$$dN/dt = rN \left(1 - \frac{N}{K}\right)$$

Question 11

Which of the following is an example of resource partitioning?

Accepted Answer

Several bird species feeding in different parts of the same tree

Question 12

What is the realized niche of Chthamalus barnacles, as shown in the diagram?

Accepted Answer

The upper intertidal zone where competition is reduced

Question 13

Which of the following is NOT a predation defense?

Accepted Answer

Resource partitioning

Question 14

In a community regulated by bottom-up control, which factor is most important?

Accepted Answer

Autotrophs

Question 15

Which scenario best illustrates the competitive exclusion principle?

Accepted Answer

One species outcompetes another, leading to the local extinction of the weaker competitor

Question 16

Which term describes the first organisms to colonize a barren environment after a volcanic eruption?

Accepted Answer

Pioneer species

Question 17

If a harmless bee mimics the coloration of a harmful wasp, what type of mimicry is this?

Accepted Answer

Batesian mimicry

Question 18

Which of the following is a characteristic of a climax community?

Accepted Answer

Stable and relatively unchanging species composition

Question 19

Which of the following best describes Mullerian mimicry?

Accepted Answer

Two harmful species resemble each other

Question 20

Which of the following is most likely to be a dominant species in a forest ecosystem?

Accepted Answer

A species with the highest biomass or abundance

Community Ecology: Structure, Interactions, and Succession

Study Guide - Practice Questions