What is an evolutionary adaptation of an existing structure for a completely new purpose (e.g., feathers for insulation or for flight)?
A)exaptation
B)key innovation
C)coevolution
D)adaptive radiation
E)microevolution

Question

Quizplus · Accepted Answer

Exaptation refers to an existing structure evolving to serve a new or different function than its original purpose. Feathers, for example, may have initially evolved for insulation or waterproofing in dinosaurs, but were exapted for flight in birds.

What Is an Evolutionary Adaptation of an Existing Structure for a Completely