Blue-footed boobies have webbed feet and are comically clumsy when they walk on land. Evolutionary scientists view these feet as

A) an example of a trait that is poorly adapted.
B) the outcome of a trade-off: Webbed feet perform poorly on land but are very helpful in diving for food.
C) an example of a trait that has not evolved.
D) a curiosity that has little to teach us regarding evolution.


Answer: B

Biology & Microbiology

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