Question 1

Which of the following best describes the significance of the fossil record in understanding evolution?

Accepted Answer

It shows that species have changed over time and that Earth is very old.

Question 2

Radiometric dating is used to determine the absolute age of rocks. Which equation is central to this process?

Accepted Answer

$$N = N_0$ e$$^{-\lambda t}$$, where N$ is the number of parent atoms remaining, N_0$ is the original number, $$\lambda$$ is the decay constant, and t$ is time.

Question 3

Which of the following is an example of a vestigial trait in humans?

Accepted Answer

The presence of a coccyx (tailbone)

Question 4

Why is the similarity in limb bone structure among birds, bats, and seals considered evidence for evolution?

Accepted Answer

It demonstrates structural homology, indicating descent from a common ancestor.

Question 5

Which of the following statements about natural selection is correct?

Accepted Answer

Natural selection acts on individuals, but only populations evolve.

Question 6

A scientist finds a fossil with features intermediate between fish and amphibians. What is this fossil an example of?

Accepted Answer

A transitional feature

Question 7

Which of the following best explains why antibiotic resistance in bacteria is an example of evolution by natural selection?

Accepted Answer

Resistant bacteria survive and reproduce, increasing the frequency of resistance alleles in the population.

Question 8

Which of the following is NOT a misconception about evolution?

Accepted Answer

Evolution is not goal-directed.

Question 9

What is a fitness trade-off?

Accepted Answer

A compromise between traits, where improving one may reduce the effectiveness of another.

Question 10

Which of the following is an example of genetic homology?

Accepted Answer

The similarity in amino acid sequences between the eyeless gene in fruit flies and the Aniridia gene in humans.

Question 11

Why do similar but distinct species often live close together in the same geographic area, according to biogeography?

Accepted Answer

They are linked by common ancestry and have diversified from a shared ancestor.

Question 12

Which of the following best describes a historical constraint in evolution?

Accepted Answer

Evolution is limited by the traits and structures inherited from ancestors.

Question 13

What is pleiotropy?

Accepted Answer

When a single allele affects multiple traits.

Question 14

Which of the following is NOT evidence that species are related through common ancestry?

Accepted Answer

Fitness trade-offs

Question 15

Which of the following statements about adaptation is TRUE?

Accepted Answer

Adaptation is a heritable trait that increases fitness in a particular environment.

Question 16

Which of the following best describes the law of succession?

Accepted Answer

Fossils in a geographic area often resemble living species in the same area.

Question 17

Why is the genetic code considered the most fundamental homology?

Accepted Answer

Because codons in mRNA that code for amino acids are homologous across almost all species.

Question 18

Which of the following is a misconception about mutation and evolution?

Accepted Answer

Mutations occur because organisms want or need them.

Question 19

Which of the following is an example of a constraint on natural selection?

Accepted Answer

Genetic correlation between traits due to pleiotropy.

Question 20

Which of the following best describes internal consistency as evidence for evolution?

Accepted Answer

Independent data sources agree in supporting predictions made by evolutionary theory.

Evolution by Natural Selection: Evidence, Mechanisms, and Misconceptions

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