Question 1

Which of the following best describes Darwin's theory of evolution by natural selection?

Accepted Answer

Populations evolve as individuals with advantageous traits survive and reproduce more successfully.

Question 2

Which of the following is an example of a vestigial structure, and what does it indicate about evolution?

Accepted Answer

The pelvis and femur in some snakes, indicating descent from limbed ancestors.

Question 3

According to the Hardy-Weinberg Law, if the frequency of the homozygous recessive genotype ($$q^2) in a $$population is 0.36, what is the frequency of the dominant allele ($$p$$)?

$$(p + q)^2 = 1$$

Accepted Answer

$$0.4$$

Question 4

Which of the following is NOT a condition required for Hardy-Weinberg genetic equilibrium?

Accepted Answer

Small population size

Question 5

A population of 1000 plants has 490 individuals with genotype BB, 420 with Bb, and 90 with bb. What is the frequency of the B allele ($$p$$)?

Accepted Answer

$$0.7$$

Question 6

Which of the following best explains why the milk barrel cactus in Africa and the saguaro cactus in North America look similar, despite being unrelated?

Accepted Answer

They are examples of convergent evolution due to similar environmental pressures.

Question 7

Which of the following statements about evolution is correct?

Accepted Answer

Populations evolve as allele frequencies change over generations.

Question 8

If a population is in Hardy-Weinberg equilibrium and the frequency of the dominant allele ($$p) is$$ $$0.8$$, what is the expected frequency of heterozygotes ($$2pq$$)?

$$(p + q)^2 = 1$$

Accepted Answer

$$0.32$$

Question 9

Which of the following is a source of genetic variation in populations?

Accepted Answer

Gene shuffling during meiosis

Question 10

A population of llamas has a frequency of homozygous dominant individuals ($$p^2) of$$ $$0.81. $$What is the frequency of the recessive allele ($$q$$)?

Accepted Answer

$$0.1$$

Question 11

Which of the following best describes artificial selection?

Accepted Answer

The selective breeding of domesticated plants and animals to promote desirable traits.

Question 12

Which of the following is a misconception about evolution?

Accepted Answer

Individuals evolve in response to their environment.

Question 13

If the frequency of the homozygous recessive genotype ($$q^2) in a $$population is $$0.09$$, what is the frequency of heterozygotes ($$2pq$$)?

$$(p + q)^2 = 1$$

Accepted Answer

$$0.42$$

Question 14

Which of the following is NOT evidence for evolution?

Accepted Answer

Random mating

Question 15

Which of the following scenarios would most likely lead to evolution in a population?

Accepted Answer

A small population with migration and mutations

Question 16

Which of the following best explains why some animals become extinct according to evolutionary theory?

Accepted Answer

They could not compete successfully for resources or adapt to environmental changes.

Question 17

Which of the following is an example of an adaptation?

Accepted Answer

Inherited camouflage coloring that helps an animal avoid predators.

Question 18

Which of the following best describes the relationship between genotype and phenotype frequencies in a population?

Accepted Answer

Genotype frequencies determine the proportion of physical traits (phenotypes) in a population.

Question 19

Which of the following is a correct application of the Hardy-Weinberg equation to a population with $$p = 0.6$$ and $$q = 0.4$$?

$$(p + q)^2 = 1$$

Accepted Answer

The frequency of heterozygotes ($$2pq) is$$ $$0.48.$$

Question 20

Which of the following best describes microevolution?

Accepted Answer

A small change in allele frequencies within a population over time.

Evolution and the Evolution of Populations: Mechanisms, Evidence, and Hardy-Weinberg Equilibrium

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