What is a vestigial structure? A. A structure that has no use in the organism B. A structure with similar shape but a different use C. A structure that is only in index fossils D. A structure that contains isotopes

A, a structure that has no use in the organism

Explanation:

A vestigial structure is an anatomical feature that no longer seems to have a purpose in the current form of an organism of the given species.

a adaptation is when organism changes itself to fit the environment

ex. when its cold outside i wear a jacket

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