Some fish have bony fins. If the body of water they are in dries out, these fins can be used to help the fish "walk" to another body of water. In this context, bony fins are an example of ________.
A)an exaptation
B)an adaptation
C)a homologous structure

Question

Quizplus · Accepted Answer

Bony fins are an example of an exaptation because they originally evolved for one function (swimming) but have been co-opted for a new use (walking on land).

Some Fish Have Bony Fins