Question 1

Which of the following best defines evolution in a biological context?

Accepted Answer

A change in allele frequency in a population over time.

Question 2

In the case study of trophy hunting in bighorn sheep, what evolutionary impact has been observed due to selective hunting of large rams?

Accepted Answer

A decrease in the average horn length and body weight of the population.

Question 3

Which of the following is NOT a requirement for evolution by natural selection to occur?

Accepted Answer

All individuals survive and reproduce equally.

Question 4

Which of the following is a misconception about evolution?

Accepted Answer

Evolution has never been observed.

Question 5

A population of beetles has two color morphs: green and brown. Birds prefer to eat green beetles. Over several generations, the frequency of brown beetles increases. Which evolutionary process is primarily responsible for this change?

Accepted Answer

Natural selection

Question 6

Which of the following best describes an adaptation?

Accepted Answer

A genetically-determined trait that enhances survival and reproduction.

Question 7

Which of the following is an example of a morphological adaptation?

Accepted Answer

Long back legs in frogs for jumping.

Question 8

Why does gene flow tend to reduce local adaptation in populations?

Accepted Answer

It introduces alleles from other populations, potentially diluting locally advantageous traits.

Question 9

Which of the following scenarios best illustrates an evolutionary tradeoff?

Accepted Answer

A plant that grows taller to reach sunlight but becomes more susceptible to wind damage.

Question 10

Which type of natural selection is illustrated by the increase in frequency of dark-colored peppered moths in industrial areas?

Accepted Answer

Directional selection

Question 11

A population of birds has a wide range of beak sizes. Over time, individuals with intermediate beak sizes are selected against, while those with very large or very small beaks survive better. What type of selection is this?

Accepted Answer

Disruptive selection

Question 12

Which of the following equations correctly represents the change in allele frequency in a population, where $$p is $$the frequency of allele A and $$q is $$the frequency of allele a?

Accepted Answer

$$p + q = 1$$

Question 13

Which of the following is NOT a category of adaptation?

Accepted Answer

Cultural

Question 14

Why does evolution not produce organisms that are perfectly adapted to their environments?

Accepted Answer

Evolution is constrained by genetic variation and evolutionary history.

Question 15

Which of the following statements about natural selection is TRUE?

Accepted Answer

Natural selection acts on individuals, but evolutionary change occurs in populations.

Question 16

In Darwin’s finches, what evidence supports the heritability of beak depth?

Accepted Answer

Offspring beak depth is correlated with midparent beak depth.

Question 17

Which of the following best describes stabilizing selection?

Accepted Answer

Selection favors individuals with intermediate trait values.

Question 18

Which of the following is an example of how ecological interactions can drive evolutionary change?

Accepted Answer

Predator-prey relationships leading to changes in both predator and prey traits.

Question 19

Which of the following is a real-world example of an evolutionary tradeoff?

Accepted Answer

Sickle-cell anemia conferring resistance to malaria.

Question 20

Why is genetic variation necessary for evolution by natural selection?

Accepted Answer

Without variation, all individuals would be equally fit.

Evolution and Adaptation: Mechanisms, Evidence, and Case Studies

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