Question 1

Which of the following best describes the difference between uniformitarianism and catastrophism in geological processes?

Accepted Answer

Uniformitarianism involves gradual, incremental changes over long periods, while catastrophism involves large, intense events with immediate impact.

Question 2

A population of frogs breeds in shallow puddles in early spring, while another population breeds in large streams in late spring. Which type of reproductive isolation is most likely preventing gene flow between these populations?

Accepted Answer

Temporal and habitat isolation

Question 3

Which scenario best illustrates mechanical isolation as a prezygotic barrier?

Accepted Answer

Two damselfly species attempt to mate, but their genitalia do not fit together, preventing successful fertilization.

Question 4

Which of the following is an example of post-zygotic reproductive isolation?

Accepted Answer

A horse and a donkey produce a mule, but the mule is infertile.

Question 5

In the context of speciation, what is the primary effect of geographic isolation on populations?

Accepted Answer

It reduces gene flow, allowing genetic drift, mutation, and natural selection to cause divergence.

Question 6

Which selection mode is most likely to maintain genetic diversity in a population by favoring rare phenotypes?

Accepted Answer

Balancing selection

Question 7

A population of fish in a lake is subject to stabilizing selection. What would you expect to happen to the distribution of body sizes over time?

Accepted Answer

The distribution will narrow, favoring intermediate body sizes.

Question 8

Which equation best represents exponential population growth?

Accepted Answer

$$rN$$

Question 9

What is the main difference between microevolution and macroevolution?

Accepted Answer

Microevolution involves small-scale changes in gene frequencies within a population, while macroevolution involves major evolutionary changes above the species level over long periods.

Question 10

Which life history strategy is characterized by many offspring, small size, no parental care, and early reproduction?

Accepted Answer

r-strategist

Question 11

Which survivorship curve is most likely to be observed in sea turtles, where most individuals die young but survivors live long lives?

Accepted Answer

Type III

Question 12

In a food chain, which organism is a primary consumer?

Accepted Answer

Zooplankton

Question 13

Which adaptation is an example of aposematic coloration?

Accepted Answer

A frog with bright colors warning predators of its toxicity.

Question 14

In the Great Lakes, what is the ecological consequence of competitive exclusion between zebra mussels and native mussels?

Accepted Answer

Native mussels decline as invasive zebra mussels outcompete them for resources.

Question 15

Which interaction in the Great Lakes is an example of commensalism?

Accepted Answer

Small fish using structure created by native mussel beds for habitat

Question 16

What is the competitive exclusion principle?

Accepted Answer

Two species that share the same limiting resource cannot coexist indefinitely; one will exclude the other.

Question 17

Which process is most likely to increase genetic diversity within a population?

Accepted Answer

Gene flow

Question 18

Which equation best represents the logistic growth model for population size?

Accepted Answer

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

Question 19

Which of the following is a real-world example of resource partitioning?

Accepted Answer

Different fish species in the Great Lakes feeding at different depths and on different prey sizes.

Ecology and Evolution: Foundations, Mechanisms, and Community Interactions

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