Descripe the parts of an amniotic egg.
how did this structure allow the move to land ?

The amniotic egg allows reptiles, birds and mammals to lay eggs on land .The allantois layer allows gases and waste to escape from the inner part of the egg.

Explanation:

The amniotic egg was an evolutionary invention that allowed the first reptiles to colonize dry land more than 300 million years ago. Fishes and amphibians must lay their eggs in water and therefore cannot live far from water. ... Within the chorion is the amnion, the membrane for which the amniotic egg is named

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