Question 1

Which of the following best describes natural selection?

Accepted Answer

Differential success in the reproduction of different phenotypes resulting from the interaction of organisms with their environment.

Question 2

Which condition is NOT required for natural selection to occur?

Accepted Answer

Acquisition of traits during an individual's lifetime.

Question 3

A population of moths lives in a forest where tree trunks are light-colored. After pollution darkens the tree trunks, which evolutionary process is most likely responsible for an increase in the frequency of dark-colored moths?

Accepted Answer

Natural selection

Question 4

Which of the following is an example of evidence for evolution based on biogeography?

Accepted Answer

The distribution of unique species in each of Earth's six biogeographical regions due to barriers preventing migration.

Question 5

Which statement about evolution is correct?

Accepted Answer

Evolution is measured as changes in proportions of heritable variations in a population over generations.

Question 6

Which agent of evolutionary change is defined as the movement of alleles between populations?

Accepted Answer

Gene flow

Question 7

A population of plants has 200-300 mutations per generation. What is the primary significance of these mutations in evolution?

Accepted Answer

They are the source of genetic diversity in the population.

Question 8

Which of the following best illustrates genetic drift?

Accepted Answer

A small population of birds is isolated on an island, and by chance, only birds with red feathers survive a storm.

Question 9

Which of the following is NOT considered evidence for evolution?

Accepted Answer

The inheritance of acquired characteristics.

Question 10

In a population, the sum total of all alleles of all genes is called the:

Accepted Answer

Gene pool

Question 11

Which process is responsible for the adaptation of populations to their environment over time?

Accepted Answer

Natural selection

Question 12

Which of the following scenarios best demonstrates nonrandom mating?

Accepted Answer

Individuals in a population pair up based on similar genotypes, leading to increased frequency of certain alleles.

Question 13

Which of the following is a biochemical evidence for evolution?

Accepted Answer

The presence of identical or nearly identical enzymes in all organisms.

Question 14

Which equation represents the Hardy-Weinberg equilibrium for a gene with two alleles, $$p$$ and $$q$$?

Accepted Answer

$$p^2 + 2pq$$ + $$q^2 = 1$

Question 15

A population of HIV viruses is treated with an anti-HIV drug. After treatment, only drug-resistant viruses remain and multiply. This is an example of:

Accepted Answer

Natural selection in action

Question 16

Which of the following statements about acquired characteristics is TRUE?

Accepted Answer

Acquired characteristics during an individual's lifetime are not inherited by offspring.

Question 17

Which of the following is a direct result of mutations in a population?

Accepted Answer

Increase in genetic diversity

Question 18

Which of the following best explains why individuals do not evolve, but populations do?

Accepted Answer

Evolution is measured as changes in allele frequencies within a population over generations, not within an individual's lifetime.

Question 19

Which of the following is NOT an agent of evolutionary change?

Accepted Answer

Acquired characteristics

Question 20

Which scenario best illustrates the concept of differential reproductive success?

Accepted Answer

In a population of giraffes, those with longer necks survive and produce more offspring than those with shorter necks.

Population Genetics and Natural Selection: Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards