Question 1

Which of the following best explains why sexual selection can lead to traits that seem disadvantageous for survival, such as elaborate plumage in male birds?

Accepted Answer

Sexual selection favors traits that increase mating success, even if they reduce survival.

Question 2

According to the study materials, what is the primary reason that about half of the human genome consists of repeated DNA sequences?

Accepted Answer

Repeated DNA sequences do not code for proteins but are a result of evolutionary processes that do not always remove extra copies.

Question 3

Which of the following is an example of a real-world application of evolutionary biology mentioned in the study materials?

Accepted Answer

Improving crop resistance to pests in agriculture.

Question 4

Darwin’s observations in the Galápagos Islands contributed to which major concept in biology?

Accepted Answer

The theory of evolution by natural selection.

Question 5

Which of the following best describes the hierarchical system of classification introduced by Linnaeus?

Accepted Answer

A system that groups organisms into nested categories such as kingdom, phylum, class, order, family, genus, and species.

Question 6

Which equation represents the Hardy-Weinberg equilibrium for a gene with two alleles, A and a, with frequencies $$p$$ and $$q$$?

Accepted Answer

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

Question 7

A population of beetles is exposed to a new pesticide. After several generations, most beetles are resistant. Which evolutionary mechanism best explains this change?

Accepted Answer

Natural selection

Question 8

Which of the following statements about phylogenetic trees is correct?

Accepted Answer

They represent hypotheses about the evolutionary relationships among species.

Question 9

Which of the following is NOT a direct implication of Darwin’s theory of evolution by natural selection?

Accepted Answer

The Earth is only a few thousand years old.

Question 10

Which of the following best describes the relationship between whales and hippos, as revealed by molecular evidence?

Accepted Answer

Whales and hippos share a more recent common ancestor with each other than with most other mammals.

Question 11

Which of the following is a major reason why the diversity of species is uneven among different groups of vertebrates?

Accepted Answer

Some groups, like bony fishes, have undergone extensive adaptive radiation.

Question 12

Which of the following best illustrates the concept of convergent evolution?

Accepted Answer

Dolphins and sharks both have streamlined bodies adapted to aquatic life, despite being unrelated.

Question 13

Which of the following is a correct statement about the use of scientific names in taxonomy?

Accepted Answer

Scientific names are always italicized, with the genus capitalized and the species lowercase.

Question 14

A scientist discovers a new species of plant that shares many features with known species in the genus Rosa. According to the Linnaean system, what is the most likely next step?

Accepted Answer

Classify the new species within the genus Rosa and assign it a unique species name.

Question 15

Which of the following best describes the main insight from Darwin’s study of finches on the Galápagos Islands?

Accepted Answer

Different species can evolve from a common ancestor by adapting to different environments.

Question 16

Which of the following is an example of how evolutionary biology can inform medical research?

Accepted Answer

Understanding the evolution of antibiotic resistance in bacteria.

Question 17

Which of the following best explains why classification systems in biology are constantly revised?

Accepted Answer

New discoveries and molecular evidence often reveal previously unknown relationships among organisms.

Question 18

Which of the following is a correct interpretation of the following equation for population growth: $$\Delta N = rN$$?

Accepted Answer

$$\Delta N$$ represents the change in population size, $$r is $$the per capita growth rate, and $$N is $$the current population size.

Descent with Modification: A Darwinian View of Life and Phylogeny

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