Question 1

Which of the following best distinguishes adaptation from acclimation/acclimatization?

Accepted Answer

Adaptation is a heritable change in a population over generations, while acclimation is a reversible, non-heritable change in an individual.

Question 2

Which scenario is an example of an exaptation?

Accepted Answer

Feathers in birds, which originally evolved for insulation and were later co-opted for flight.

Question 3

A scientist claims that the flat body of a land crab is an adaptation for living between bromeliad leaves, but provides no experimental evidence. This is an example of:

Accepted Answer

An adaptationist fairy tale (just-so story)

Question 4

Which of the following is NOT required to demonstrate that a trait is an adaptation?

Accepted Answer

The trait must have evolved specifically for its current function.

Question 5

In a reciprocal transplant experiment, what result would support the hypothesis of local adaptation?

Accepted Answer

Individuals have higher fitness in their native environment than in the foreign environment.

Question 6

Which of the following best describes why complex adaptations, such as the vertebrate eye, do not require 'intelligent design' to evolve?

Accepted Answer

Complex adaptations can evolve through gradual, advantageous steps, each conferring a fitness benefit.

Question 7

Which of the following is a constraint that prevents the evolution of a 'Darwinian demon' (an organism that maximizes all aspects of fitness)?

Accepted Answer

Trade-offs in resource allocation between different functions such as growth and reproduction.

Question 8

Which of the following is an example of a historical constraint on adaptation?

Accepted Answer

The recurrent laryngeal nerve in giraffes, which takes an inefficient route due to evolutionary history.

Question 9

Which of the following statements about natural selection and adaptation is correct?

Accepted Answer

Natural selection lacks foresight and cannot anticipate future environmental changes.

Question 10

A population of mice living on light-colored sand has evolved a lighter coat color due to two mutations: one in the $$Mc1r$$ gene and one in the $$Agouti$$ gene. Which experimental approach would best test whether this trait is an adaptation to reduce predation?

Accepted Answer

Placing clay models of both light and dark mice in both habitats and measuring predation rates.

Question 11

Which of the following best illustrates a trade-off in adaptation?

Accepted Answer

A plant that allocates more resources to producing seeds has fewer resources for leaf growth.

Question 12

Which of the following is a misconception about natural selection and adaptation?

Accepted Answer

Evolution is goal-oriented and anticipates future needs.

Question 13

Which of the following best describes the comparative method in studying adaptation?

Accepted Answer

Comparing trait differences among species in relation to differences in their environments.

Question 14

Which of the following is an example of acclimatization rather than adaptation?

Accepted Answer

A person moving to high altitude develops increased red blood cell count within weeks.

Question 15

Which of the following evolutionary processes can reduce the effectiveness of adaptation by natural selection?

Accepted Answer

Gene flow introducing maladaptive alleles from other populations.

Question 16

Which of the following statements about the evolution of complex adaptations is correct?

Accepted Answer

Complex adaptations can evolve through a series of intermediate, functional steps.

Question 17

Which of the following is an example of a functional trade-off that constrains adaptation?

Accepted Answer

A fish with gills optimized for oxygen uptake in cold water may be less efficient in warm water.

Question 18

Which of the following best explains why not all traits are adaptations?

Accepted Answer

Some traits may be byproducts of other adaptations or due to genetic drift.

Question 19

Which of the following is a real-world example of convergent evolution in adaptation?

Accepted Answer

Different human populations have independently evolved high-altitude adaptations using different genetic pathways.

Question 20

Which of the following best describes the relationship between adaptation and complexity?

Accepted Answer

Adaptations are not necessarily complex; even simple traits can be highly adaptive.

Adaptation: Concepts, Evidence, and Constraints in Evolutionary Biology

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