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the __ni_n is a sac that keeps reptile eggs moist ​

Sagot :

Answer:

Amnion

Explanation:

The amnion is a fluid-filled sac where the embryo develops. The fluid in the sac keeps the embryo moist. Birds, reptiles, and mammals have amniotic eggs. Because amphibian eggs don't have an amnion, the eggs would dry out if they were laid on the land, so amphibians lay their eggs in water.