Question

Both mammal and fish embryos contain gill slits. Similarly, whales, some snakes, and land animal embryos all exhibit hind limbs. How do the similarities in these developing organisms show relationships not evident in the fully formed anatomy?

Answer 1

Answer:

These features show that these features were once used by the creature, but thanks to evolution the species changed. However, a part is still there, as the bone has not fully evolved out.

Explanation:

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