Why is the Amniotic Egg Considered an Important Evolutionary Breakthrough

Question

Why is the amniotic egg considered an important evolutionary breakthrough?
A)It has a shell that increases gas exchange.
B)It allows deposition of eggs in a terrestrial environment.
C)It prolongs embryonic development.
D)It provides insulation to conserve heat.
E)It permits internal fertilization to be replaced by external fertilization.

Accepted Answer

The amniotic egg allows deposition of eggs in a terrestrial environment, which was a major evolutionary breakthrough that allowed reptiles and birds to reproduce on land without the need for a water source. This was a significant advantage in terms of survival and adaptation to different habitats.