Which structures are similar in function, but do not guarantee that the organisms are related? A. analogous structures B. homologous structures C. vestigial structures D. transitional structures

The answer is letter A. analogous structure.

In the modern growth of biology, the description of analogous structures pertain or refer to the various structures in different species having the same function or use but have evolved separately, thus doesn’t share common and the same ancestor.

The answer would be (A) ... Analogous Structure