Multiple Choice 20 points During the early stages of development, dolphin embryos begin to develop hindlimbs. By the time the dolphin fetuses 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 limbs Dolphins are evolving to become terrestrial animals.

The correct answer is: The early ancestors of dolphins had limbs.<br /><br />Explanation: The early development of hind limbs in dolphin embryos is a vestigial trait, meaning it is a remnant from their evolutionary ancestors who had limbs. These ancestors were land-dwelling mammals that eventually adapted to an aquatic environment, leading to the evolution of dolphins. The hind limbs eventually disappear as the fetus develops, as they are no longer needed for the dolphin's aquatic lifestyle. This is an example of how evolution can shape the development of organisms over time.