Which of the following is the most clearly adaptive for humans?
A) hiccups
B) the fight-or-flight response
C) schizophrenia
D) red hair
Answer: B
Rationale: Adaptations increase the likelihood that an organism will survive and reproduce. The fight-or-flight response is most likely to be adaptive because it clearly helps individuals in potentially dangerous situations, where the only way to avoid injury or death requires extra energy. While it is possible that hiccups and red hair might have some adaptive function, this is not nearly as obvious.
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a. testing c. history b. multiple treatment interference d. external validity
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What will be an ideal response?