Question

1. during early stages of development, dolphin embryos begin to develop hind limbs. by the time the dolphin features are fully developed, the hind limbs have disappeared. which statement best explains the early development and then disappearance of hind limbs in dolphins? dolphin fetuses change their development to adapt to an aquatic environment. the genes that control the development of hind limbs are destroyed as the fetus develops. the early ancestors of dolphins had hind limbs. dolphins are evolving to become terrestrial animals. clear all

Explanation:

This is an example of evolutionary vestigial structures. Dolphins' early development of hind limbs and their subsequent disappearance is likely due to inheritance from ancestors that had hind limbs, with the limbs becoming unnecessary in their fully - aquatic lifestyle over time.

Answer:

The early ancestors of dolphins had hind - limbs.