Question 1

Which of the following best describes Darwin's concept of 'descent with modification'?

Accepted Answer

Species change over generations, with new species arising from ancestral forms through the accumulation of inherited modifications.

Question 2

Which scientist's principle of uniformitarianism, stating that geological processes are constant over time, most influenced Darwin's thinking about the age of the Earth?

Accepted Answer

Charles Lyell

Question 3

A population of soapberry bugs in Florida evolved shorter beaks after feeding on a new plant with smaller fruit. Which evolutionary mechanism does this scenario best illustrate?

Accepted Answer

Natural selection

Question 4

Which of the following statements about natural selection is TRUE?

Accepted Answer

Natural selection acts on populations, not individuals.

Question 5

MRSA (methicillin-resistant Staphylococcus aureus) is an example of evolution in action. What is the primary reason MRSA is resistant to methicillin?

Accepted Answer

MRSA has a modified protein in its cell wall that methicillin cannot inhibit.

Question 6

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

Accepted Answer

The human appendix

Question 7

Which of the following best distinguishes homologous structures from analogous structures?

Accepted Answer

Homologous structures share a common evolutionary origin, while analogous structures result from similar environmental pressures in unrelated lineages.

Question 8

Which of the following scenarios is an example of convergent evolution?

Accepted Answer

Wings of bats and wings of birds, which evolved independently for flight.

Question 9

Which of the following best explains why artificial selection can lead to rapid changes in a population?

Accepted Answer

Artificial selection allows humans to select and breed individuals with desired traits, increasing the frequency of those traits in a few generations.

Question 10

Which of the following is NOT a line of evidence supporting the theory of evolution by natural selection?

Accepted Answer

The belief that species are fixed and unchanging.

Question 11

A scientist is constructing an evolutionary tree using DNA sequence data. What is the most likely reason that the tree might change in the future?

Accepted Answer

DNA sequences from more species may be analyzed, revealing new relationships.

Question 12

Which of the following best describes the relationship between the unity and diversity of life as explained by Darwin's theory?

Accepted Answer

Unity is due to shared ancestry, while diversity results from adaptations to different environments.

Question 13

Which of the following is a correct statement about the process of speciation?

Accepted Answer

Speciation is the formation of new species when populations accumulate enough genetic differences over time.

Question 14

Which of the following best explains why not all offspring survive and reproduce, according to Darwin's observations?

Accepted Answer

Environmental resources are limited, leading to competition among individuals.

Question 15

Which of the following equations best represents the Hardy-Weinberg equilibrium for a gene with two alleles, $$p$$ and $$q$$?

Accepted Answer

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

Question 16

A population of insects is exposed to a new pesticide. After several generations, most individuals are resistant to the pesticide. Which of the following best explains this outcome?

Accepted Answer

Insects with natural resistance survived and reproduced, increasing the frequency of resistance alleles in the population.

Question 17

Which of the following is an example of biogeographical evidence for evolution?

Accepted Answer

The presence of similar but distinct species of finches on different Galapagos Islands.

Question 18

Which of the following best describes the role of mutations in evolution?

Accepted Answer

Mutations create genetic variation, which can be acted upon by natural selection.

Question 19

Which of the following statements about evolutionary trees is correct?

Accepted Answer

Evolutionary trees are hypotheses that can change as new data become available.

Descent with Modification: A Darwinian View of Life (Chapter 22 Study Notes)

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