Question 1

Which of the following best describes a 'branch point' in an evolutionary tree?

Accepted Answer

A point where a single lineage splits into two distinct evolutionary paths.

Question 2

Which of the following is NOT one of the three domains of life?

Accepted Answer

Protista

Question 3

A scientist proposes a hypothesis that brightly colored spots on male guppies increase their chances of being selected by females. Which two criteria must this hypothesis meet to be considered scientific?

Accepted Answer

It must be testable and falsifiable.

Question 4

Which statement best explains the difference between 'lineage' and 'trait' in evolutionary biology?

Accepted Answer

A trait is a characteristic, while a lineage is a sequence of species connected by ancestry.

Question 5

Which of the following is an example of convergent evolution?

Accepted Answer

The development of wings in bats and birds.

Question 6

Which process is most likely to result in homologous structures?

Accepted Answer

Divergent evolution

Question 7

If a population of cliff swallows is exposed to a sudden decrease in available nesting sites, which evolutionary mechanism is most likely to affect the population size?

Accepted Answer

Genetic drift

Question 8

Which equation best represents the Hardy-Weinberg equilibrium for allele frequencies in a population?

Accepted Answer

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

Question 9

A population of guppies is placed in an environment with many visual predators. What is the most likely evolutionary outcome for male guppy coloration over several generations?

Accepted Answer

Male guppies will evolve duller coloration to avoid predation.

Question 10

Which of the following best describes sexual selection?

Accepted Answer

Selection imposed by mate choice, often leading to traits that increase reproductive success.

Question 11

Which scientist is most closely associated with the idea that acquired traits can be inherited?

Accepted Answer

Jean-Baptiste Lamarck

Question 12

Which of the following is a random evolutionary process?

Accepted Answer

Genetic drift

Question 13

A scientist finds a fossil in a rock pocket mouse population that shows a transition from light to dark fur. What does this most likely indicate?

Accepted Answer

Natural selection favoring dark fur in a new environment.

Question 14

Which of the following is NOT a property required for evolution by natural selection?

Accepted Answer

All individuals must survive and reproduce equally

Question 15

If a trait under selection is lost from a population, which of the following is the most likely explanation?

Accepted Answer

The trait provided no reproductive advantage.

Question 16

Which of the following best explains why evolution can occur without natural selection?

Accepted Answer

Evolution can occur through genetic drift, which changes allele frequencies randomly.

Question 17

Which of the following is a plausible mechanism that could limit the growth of a population?

Accepted Answer

Limited nesting sites

Question 18

Which of the following statements about adaptation is correct?

Accepted Answer

Adaptation is a process by which populations become better suited to their environment over generations.

Question 19

Which of the following best describes the evolutionary advantage of brightly colored spots on male guppies?

Accepted Answer

They increase the likelihood of being chosen by females for mating.

Question 20

Which of the following is an example of a scientific argument supporting a claim about natural selection?

Accepted Answer

Observing that darker mice survive better on dark rocks and providing data showing increased frequency of dark fur alleles over time.

Overview of Evolution and Natural Selection: Study Guide

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