Question

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

Explanation:

A vestigial structure is a reduced or non - functional structure that has lost most or all of its original function through the course of evolution. The dewclaw in dogs is a reduced and non - functional digit, which fits the definition of a vestigial structure. Homologous structures are similar due to common ancestry and may have different functions. Mutated structure is not a standard evolutionary term for such a feature. Analogous structures have similar functions but different evolutionary origins.

Answer:

vestigial structure