Psychology I / Evolutionary Psychology
Practice question · True or false

Showing that a trait is useful today is enough to prove it is an evolutionary adaptation.

Hints
  1. Current usefulness and being selected FOR a function are different claims.
  2. An adaptation requires evidence of ancestral selection for that function, not just present-day utility.
Show the answer

False

Why

False. Present usefulness does not establish that a trait was selected for that function - it could be a by-product or coincidentally useful. Proving adaptation requires positive evidence of ancestral selection for the function, which is the discipline's central standard.

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