Question

Snakes and lizards are reptiles. Both organisms have pelvic organs, even though snakes don’t have hind legs. What are the best explanations for this situation?

Answer 1

The best explanation for this situation is that snakes and lizards evolved from a common ancestor that had pelvic organs. Over time, snakes lost their hind legs due to natural selection, but the pelvic organs remained as a vestigial structure. This is because the pelvic organs are not essential for survival, so they were not selected against.