Feathers are an example of a(n) ________; they originally evolved ________.
A) homology; for flight in an entire lineage of dinosaurs
B) exaptation; in anticipation of future use in the development of flight
C) exaptation; for some other function and only later became adapted for flight

Question

Quizplus · Accepted Answer

Feathers originally evolved for some other function, such as insulation or display, and only later became adapted for flight. This is an example of exaptation, where a trait that evolved for one purpose becomes adapted for a different function. Evidence suggests that feathers evolved in advanced theropod dinosaurs before the evolution of flight.

Feathers Are an Example of A(n) ________; They Originally Evolved