Question 1

Which of the following best describes the difference between homologous and analogous structures in evolutionary biology?

Accepted Answer

Homologous structures are similar due to shared ancestry, while analogous structures are similar due to similar environmental pressures.

Question 2

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

Accepted Answer

0.42

Question 3

Which of the following is NOT a requirement for Hardy-Weinberg equilibrium in a population?

Accepted Answer

Small population size

Question 4

The Irish potato famine was caused by a lack of genetic diversity in the potato crop. Which evolutionary concept does this example best illustrate?

Accepted Answer

The importance of genetic variation for population resilience

Question 5

Which pattern of selection is illustrated when both very light and very dark colored rabbits are favored over medium colored rabbits in a population?

Accepted Answer

Disruptive selection

Question 6

A population of birds is separated by a mountain range, preventing gene flow between the two groups. Over time, each group evolves into a distinct species. What type of speciation is this?

Accepted Answer

Allopatric speciation

Question 7

Which of the following is a post-zygotic reproductive isolating mechanism?

Accepted Answer

Reduced hybrid fertility

Question 8

In the Miller-Urey experiment, which substances were used to simulate Earth's early atmosphere and resulted in the formation of organic molecules?

Accepted Answer

H$$_2O $$vapor, H$$_2$$, NH$$_3$$, CH$$_4$$

Question 9

Which equation represents the Hardy-Weinberg genotype frequencies for a gene with two alleles?

Accepted Answer

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

Question 10

Which evolutionary process is most likely responsible for the rapid evolution of antibiotic resistance in bacteria?

Accepted Answer

Artificial selection

Question 11

Which of the following best describes adaptive radiation?

Accepted Answer

The rapid diversification of a single ancestral species into multiple new forms

Question 12

Which domain contains organisms with cell walls composed of peptidoglycan?

Accepted Answer

Bacteria

Question 13

A phylogenetic tree is constructed using amino acid differences in hemoglobin between several vertebrates. Which species is most closely related to humans based on the data?

Accepted Answer

Rhesus monkey

Question 14

Which model of evolution is characterized by long periods of stasis interrupted by short bursts of rapid change?

Accepted Answer

Punctuated equilibrium

Question 15

Which of the following is an example of convergent evolution?

Accepted Answer

The similar body shapes of sharks and dolphins

Question 16

If a population is not in Hardy-Weinberg equilibrium, which of the following could be a cause?

Accepted Answer

Gene flow due to migration

Question 17

Which of the following best explains why vestigial organs are considered evidence for evolution?

Accepted Answer

They are remnants of structures that were important in evolutionary ancestors.

Question 18

Which of the following is a pre-zygotic reproductive isolating mechanism?

Accepted Answer

Gametic isolation

Question 19

Which of the following statements about the biological species concept is correct?

Accepted Answer

A species consists of organisms that can interbreed and produce viable, fertile offspring.

Question 20

Which of the following best describes the founder effect?

Accepted Answer

A new colony is started by a few members of the original population, leading to reduced genetic variation and a non-random sample of genes.

Comprehensive Study Notes on Evolutionary Biology

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