Which of the Following Is Not a Possible Reason for Why

question 12

Multiple Choice

Which of the following is not a possible reason for why adaptations are not perfect?

• A) Gene flow can bring genetic variants into a population that are not perfectly adapted to the local environment.
• B) The population may lack the appropriate genetic variation to respond to natural selection.
• C) An allele that is favored by natural selection may cause other effects that are harmful.
• D) Some adaptations, such as physiological adaptations to minimize heat stress in a globally warming climate, may be beneficial throughout the geographic range of a species.

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