Question 1

Which of the following best describes the concept of uniformitarianism as proposed by Charles Lyell, and how did it influence Darwin's thinking about evolution?

Accepted Answer

Uniformitarianism proposes that Earth's features result from slow, continuous processes over long periods, supporting the idea that species can gradually change.

Question 2

Jean-Baptiste de Lamarck proposed that organisms could change during their lifetimes by using or not using certain body parts. Which principle is this an example of?

Accepted Answer

Use and disuse

Question 3

According to Darwin's theory, which of the following is necessary for natural selection to occur in a population?

Accepted Answer

Traits must be heritable and there must be variation among individuals.

Question 4

Which observation by Darwin supports the idea that populations, not individuals, evolve over time?

Accepted Answer

Over generations, the proportion of individuals with advantageous traits increases in the population.

Question 5

Which of the following is an example of an adaptation as explained by Darwin's theory of natural selection?

Accepted Answer

A population of insects developing resistance to a pesticide over several generations.

Question 6

Which two inferences did Darwin make based on his four observations about variation and heritability?

Accepted Answer

Individuals with advantageous traits are more likely to survive and reproduce, leading to accumulation of favorable traits in populations.

Question 7

How do antibiotics cause bacteria to become resistant, and what does this demonstrate about evolution?

Accepted Answer

Antibiotics kill susceptible bacteria, allowing resistant bacteria (with pre-existing mutations) to survive and reproduce, demonstrating natural selection.

Question 8

Which of the following best describes homologous structures and their significance in evolutionary biology?

Accepted Answer

Structures that are similar in form and origin due to shared ancestry, even if their functions differ.

Question 9

Vestigial structures are important evidence for evolution because they:

Accepted Answer

Indicate that some traits were useful to ancestors but are no longer functional in current species.

Question 10

Analogous structures arise through which evolutionary process, and what does this indicate about the species involved?

Accepted Answer

Convergent evolution; species have adapted to similar environments despite not being closely related.

Question 11

Which of the following scenarios best illustrates convergent evolution?

Accepted Answer

Wings of bats and birds, which have similar functions but evolved independently.

Question 12

How does the fossil record provide evidence for evolution?

Accepted Answer

It documents the appearance, change, and extinction of species over time, revealing transitional forms.

Question 13

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

Accepted Answer

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

Question 14

A population of beetles has two alleles for color: green (G) and brown (g). If the frequency of G is 0.7 and g is 0.3, what is the expected frequency of heterozygotes under Hardy-Weinberg equilibrium?

Accepted Answer

$$2pq = 2 	imes 0.7 	imes 0.3 = 0.42$$

Question 15

Which of the following statements about natural selection is correct?

Accepted Answer

Natural selection acts on individuals, but its effects are seen in populations over generations.

Question 16

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

Accepted Answer

Unlimited resources for all individuals

Question 17

If a population of bacteria is exposed to an antibiotic, and some survive due to a genetic mutation, what will likely happen to the frequency of the resistance allele in subsequent generations?

Accepted Answer

The frequency of the resistance allele will increase as resistant bacteria reproduce.

Question 18

Which of the following best explains why vestigial structures, such as the human appendix, are considered evidence for evolution?

Accepted Answer

They are remnants of structures that were functional in ancestral species.

Question 19

Which of the following is an example of a homologous structure?

Accepted Answer

The forelimbs of a human and the forelimbs of a whale.

Study Notes: The Darwinian Revolution and Evidence for Evolution

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