Feathers in birds appear to have first evolved for insulation but later conveyed a new advantage in helping create light aerodynamic surfaces.This switch in function is an example of a(n)________.
A)paedomorphosis
B)an analogy
C)an adaptation
D)exaptation

Question

Quizplus · Accepted Answer

Exaptation refers to a feature or trait that evolved for one purpose but was later co-opted for a different function. In this case, feathers initially evolved for insulation but were later adapted for use in flight, providing birds with an aerodynamic advantage.

Feathers in Birds Appear to Have First Evolved for Insulation