Question

dogs have a reduced nonfunctional digit on their paws known as a dewclaw. what is this an example of?
analogous structure
homologous structure
vestigial structure
mutated structure

Explanation:

A vestigial structure is a reduced, non - functional structure that was functional in an ancestor. Since the dewclaw in dogs is a reduced and non - functional digit, it fits the definition of a vestigial structure. Analogous structures have similar functions but different evolutionary origins. Homologous structures have a common evolutionary origin but may have different functions. A mutated structure implies a change due to mutation, which is not the main characteristic here.

Answer:

C. vestigial structure