Question

4 multiple choice 1 point a vestigial structure is: fully functional in all organisms a mutated gene a reduced or unused structure from ancestors always visible

Explanation:

A vestigial structure is a reduced or unused structure that has lost most or all of its original function through evolution. It is a remnant from ancestors. For example, the appendix in humans is considered a vestigial structure. It is not fully functional in all organisms (as its function has diminished in some), it is not a mutated gene (it is a physical structure), and it is not always visible (some vestigial structures are internal and not easily seen).

Answer:

A reduced or unused structure from ancestors