Question 1

Which type of community interaction results in both species being harmed, as shown in Table 28-1?

Accepted Answer

Interspecific competition

Question 2

In the experiment with Paramecium aurelia and Paramecium caudatum, what principle is illustrated when both species are grown in the same flask and one population declines?

Accepted Answer

Competitive exclusion principle

Question 3

Resource partitioning, as shown by different warbler species feeding in different parts of a tree, is an example of:

Accepted Answer

Reducing interspecific competition

Question 4

Which equation best describes the effect of competition on population growth, where $$N is $$population size, $$r is $$intrinsic growth rate, and $$K is $$carrying capacity?

Accepted Answer

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

Question 5

Which of the following is a real-world example of an invasive species negatively impacting native populations, as shown in the images?

Accepted Answer

Burmese python in Florida

Question 6

The relationship between a human body louse and its host is best described as:

Accepted Answer

Parasitism

Question 7

Which of the following is an example of warning coloration, as seen in the images?

Accepted Answer

Skunk's black and white pattern

Question 8

Müllerian mimicry is best illustrated by which scenario?

Accepted Answer

Two distasteful butterfly species resembling each other

Question 9

Which interaction is characterized by one species benefiting and the other being unaffected?

Accepted Answer

Commensalism

Question 10

If a keystone species is removed from a community, what is the most likely outcome?

Accepted Answer

Dramatic changes in community structure and loss of biodiversity

Question 11

Which form of mimicry involves a harmless species imitating a harmful one to avoid predation?

Accepted Answer

Batesian mimicry

Question 12

Which scenario best illustrates aggressive mimicry?

Accepted Answer

A predator resembling a harmless object to lure prey

Question 13

What is the main ecological consequence of resource partitioning among warbler species?

Accepted Answer

Allows coexistence by reducing direct competition

Question 14

Which equation would you use to model the population growth of two competing species, $$N_1$$ and $$N_2$$, with competition coefficients $$\alpha$$ and $$\beta$$?

Accepted Answer

$$\frac{dN_1$}{dt} = r_1$ N_1$ \left(1 - \frac{N_1$ + \alpha N_2$}{K_1$}\right)$$

Question 15

Which of the following is an example of primary succession?

Accepted Answer

Colonization of bare rock by lichens and mosses

Question 16

A population of squirrels is reduced after the introduction of a competing species. Which ecological concept does this illustrate?

Accepted Answer

Competitive exclusion

Question 17

Which adaptation is most likely to help prey avoid predation, as seen in the images?

Accepted Answer

Camouflage

Question 18

Which scenario best illustrates secondary succession?

Accepted Answer

Forest regrowth after a fire

Question 19

Which of the following is an example of mutualism?

Accepted Answer

Clownfish and sea anemone

Question 20

If a population of prey increases, what is the most likely effect on the population of its predator, according to the consumer-prey interaction?

Accepted Answer

Predator population will increase

Community Interactions: Structure, Dynamics, and Adaptations

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