Considering the phylogenetic evidence of feather evolution, all of the following might have been original functions of feathers EXCEPT
A) heat retention.
B) flight.
C) waterproofing.
D) shielding from sunlight.

Question

Quizplus · Accepted Answer

Feathers likely evolved for purposes other than flight initially, such as insulation (heat retention), waterproofing, and protection from sunlight. The adaptation for flight is believed to have occurred later in the evolutionary history of feathers.

Considering the Phylogenetic Evidence of Feather Evolution, All of the Following