Question 1

Which of the following best describes the process of natural selection as outlined by Darwin?

Accepted Answer

Individuals with heritable traits that increase survival and reproduction become more common in the population over generations.

Question 2

A population of black rock mice lives on a volcanic rock field. Over time, the frequency of the black fur allele increases. Which mechanism best explains this observation?

Accepted Answer

Natural selection favoring black mice due to predation on lighter mice.

Question 3

Which of the following is NOT an assumption of Hardy-Weinberg equilibrium?

Accepted Answer

Natural selection is acting on the population.

Question 4

If the frequency of allele A is $$p = 0.7$$ and allele a is $$q = 0.3 in a $$population at Hardy-Weinberg equilibrium, what is the expected frequency of heterozygotes?

Accepted Answer

$$2pq = 0.42$$

Question 5

Which of the following best illustrates stabilizing selection?

Accepted Answer

A population of plants where intermediate height plants have higher fitness than either short or tall plants.

Question 6

Which statement about mutations is correct?

Accepted Answer

Mutations are the ultimate source of new genetic variation in populations.

Question 7

Which of the following is a real-world example of artificial selection?

Accepted Answer

The breeding of dogs for specific traits by humans.

Question 8

Which of the following best describes the difference between homology and analogy?

Accepted Answer

Homology refers to traits inherited from a common ancestor, while analogy refers to traits with similar function but different evolutionary origins.

Question 9

Which of the following is a post-transcriptional modification in eukaryotes?

Accepted Answer

Addition of a 5' cap to the pre-mRNA.

Question 10

A fungus forms a mutualistic association with plant roots, helping the plant absorb nutrients. This association is called:

Accepted Answer

Mycorrhizae

Question 11

Which of the following is true about the process of translation in eukaryotes?

Accepted Answer

The ribosome reads mRNA codons from the 5' to 3' direction.

Question 12

Which of the following is a correct statement about gene flow?

Accepted Answer

Gene flow involves the movement of alleles between populations.

Question 13

Which of the following best describes the function of tRNA during translation?

Accepted Answer

tRNA carries amino acids to the ribosome and matches them to the mRNA codon via its anticodon.

Question 14

Which of the following is an example of disruptive selection?

Accepted Answer

A population of fish where both very small and very large individuals have higher fitness than medium-sized fish.

Question 15

Which process is responsible for the removal of introns from pre-mRNA in eukaryotes?

Accepted Answer

RNA splicing

Question 16

Which of the following is a correct Hardy-Weinberg equation for genotype frequencies?

Accepted Answer

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

Question 17

Which of the following is a correct statement about the role of fungi in ecosystems?

Accepted Answer

Fungi decompose organic material and can form mutualistic relationships with plants and animals.

Question 18

Which of the following is a misconception about evolution by natural selection?

Accepted Answer

Evolution is just a theory and not well-supported by evidence.

Question 19

Which of the following best describes the process of sexual reproduction in fungi?

Accepted Answer

Fusion of two haploid nuclei to form a diploid zygote, followed by meiosis to produce spores.

Core Concepts in Evolution, Fungi, and Gene Expression

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