Question 1

Which of the following evolutionary mechanisms is most likely to result in adaptation to the environment?

Accepted Answer

Natural selection

Question 2

A population of insects is exposed to a new pesticide. After several generations, most individuals are resistant. Which process best explains the increase in resistance?

Accepted Answer

Directional selection

Question 3

Which equation best represents the calculation of fitness in evolutionary biology?

Accepted Answer

$$W = \frac{N_{offspring}}{N_{parents}}$$

Question 4

Which of the following is a consequence of genetic drift in small populations?

Accepted Answer

Allele frequencies change randomly, potentially leading to fixation or loss

Question 5

A population bottleneck is most likely to result in which of the following?

Accepted Answer

Random loss of alleles due to chance

Question 6

Which process increases genetic variation within a population by introducing new alleles?

Accepted Answer

Mutation

Question 7

In a population of birds, individuals with very large or very small beaks survive better than those with intermediate beak sizes. What type of selection is occurring?

Accepted Answer

Disruptive selection

Question 8

Which of the following best describes gene flow?

Accepted Answer

Movement of alleles between populations via migration

Question 9

Ellis-van Creveld syndrome is unusually prevalent among the Old Order Amish due to which evolutionary process?

Accepted Answer

Founder effect

Question 10

Which of the following is NOT a source of genetic variation?

Accepted Answer

Genetic drift

Question 11

Which type of selection tends to reduce genetic diversity by favoring intermediate phenotypes?

Accepted Answer

Stabilizing selection

Question 12

Sexual dimorphism in a species is most likely the result of which evolutionary process?

Accepted Answer

Sexual selection

Question 13

Which scenario best illustrates the effect of male-male competition in sexual selection?

Accepted Answer

Males fighting for control of territories to attract females

Question 14

If a population of plants receives pollen from a neighboring population, what is the most likely evolutionary consequence?

Accepted Answer

Increase in genetic variation due to gene flow

Question 15

Which of the following statements about mutation is correct?

Accepted Answer

Mutations are random with respect to fitness

Question 16

Which process is most likely to decrease genetic differences between two populations over time?

Accepted Answer

Gene flow

Question 17

A population of mammals is reduced to a few individuals after a natural disaster. What is the most likely genetic consequence?

Accepted Answer

Loss of alleles due to population bottleneck

Question 18

Which of the following is an example of female mate choice in sexual selection?

Accepted Answer

Females selecting males with elaborate courtship displays

Question 19

Which type of selection can lead to the formation of new species if individuals with extreme traits preferentially mate with each other?

Accepted Answer

Disruptive selection

Question 20

Which evolutionary process is described as a 'blind luck' change in allele frequency, and does NOT result in adaptation?

Accepted Answer

Genetic drift

Evolutionary Processes: Mechanisms and Types of Selection

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