Question 1

Which of the following best describes 'descent with modification' as used by Darwin?

Accepted Answer

The process by which species accumulate differences from their ancestors as they adapt to different environments over time.

Question 2

Which scientist is credited with developing the binomial system of naming species and grouping them into nested categories?

Accepted Answer

Carolus Linnaeus

Question 3

According to Darwin, what is the primary mechanism that explains the adaptation of organisms to their environment?

Accepted Answer

Natural selection

Question 4

Which of the following statements about natural selection is TRUE?

Accepted Answer

Natural selection can only act on heritable traits that vary among individuals.

Question 5

Which of the following is an example of artificial selection?

Accepted Answer

The breeding of wild mustard to produce cabbage, broccoli, and kale.

Question 6

Why was the age of Earth important for Darwin’s theory of evolution?

Accepted Answer

It provided enough time for gradual evolutionary changes to accumulate.

Question 7

Which of the following best explains why the forelimbs of humans, cats, whales, and bats are considered homologous structures?

Accepted Answer

They share a common underlying structure inherited from a common ancestor.

Question 8

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

Accepted Answer

Resistant individuals were already present, and natural selection increased their frequency.

Question 9

Which of the following is an example of convergent evolution?

Accepted Answer

The similar body shapes of dolphins (mammals) and sharks (fish) due to adaptation to aquatic environments.

Question 10

Which line of evidence supports the hypothesis that cetaceans (whales, dolphins) descended from land mammals and are closely related to even-toed ungulates?

Accepted Answer

The presence of similar ankle bones (astragalus) in both groups.

Question 11

Which of the following best describes a vestigial structure?

Accepted Answer

A structure that is fully functional in an ancestor but reduced or nonfunctional in a descendant.

Question 12

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

Accepted Answer

A changing environment.

Question 13

A scientist finds a fossil of a mammal in the Andes mountains. Based on biogeography, which present-day mammals would you expect it to most closely resemble?

Accepted Answer

Mammals from South American jungles.

Question 14

Which of the following best explains why antibiotic resistance in bacteria is a major public health concern?

Accepted Answer

Bacteria can exchange genes for resistance, leading to multidrug-resistant strains.

Question 15

Which of the following is an example of a direct observation of evolutionary change?

Accepted Answer

The change in beak length of soapberry bugs in response to a new food source.

Question 16

Which of the following statements about evolutionary trees is TRUE?

Accepted Answer

They represent hypotheses about evolutionary relationships.

Question 17

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

Accepted Answer

Homologous structures share common ancestry, while analogous structures share similar function but not ancestry.

Question 18

Which of the following is a prediction that can be made using evolutionary theory and biogeography?

Accepted Answer

The oldest fossils of a group should be found on the continent where the group originated.

Question 19

Which of the following best explains why all vertebrate embryos have pharyngeal arches and a post-anal tail at some stage of development?

Accepted Answer

These features are homologous, inherited from a common ancestor.

Question 20

Which of the following is a key point about natural selection?

Accepted Answer

Natural selection depends on the current environment and can favor different traits at different times or places.

Descent with Modification: A Darwinian View of Life – Study Notes

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