Question

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question 10 (mandatory) (2 points)
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the femur in a snake and pelvis in a whale are examples of ________ structures.
analogous
vestigial
homologous
homeotic
heterologous
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Explanation:

Vestigial structures are reduced or leftover body parts that no longer serve the main function they did in an organism's ancestors. Snakes lost the need for functional legs over evolution, leaving small femur bones; whales evolved from land-dwelling ancestors, retaining a non-functional pelvis. These match the definition of vestigial structures, unlike analogous (similar function, different origin), homologous (similar origin, different function), homeotic (gene-related body patterning), or heterologous (unrelated structures) options.

Answer:

vestigial