Question

Why do organisms have vestigial

structures?
A. Scientists cannot agree on an answer.
B. The structure once served a function, but has not been
removed from the body plan.
C. Organisms often have structures that are created
through mutations.

Answer 1

B.) The structure once served a function, but has not been removed from the body plan.

Step-by-step explanation:

A.) is incorrect because there is a generally accepted theory as to why organisms have vestigial structures.

B.) is correct because this is the most widely held explanation argued by scientists. This theory is supported by the fossil record, close examination of the organisms' genes, and the knowledge that organisms don't have the extra energy to spend creating a body part that has never served any function.

C.) is incorrect because mutations with no advantage rarely become widespread amongst a species.