The amniotic egg evolved as an adaptation
A)against predation.
B)to insure survival in the uterus.
C)to prevent desiccation.
D)to permit the embryo to develop undisturbed up to the time of hatching.

Question

Quizplus · Accepted Answer

The amniotic egg evolved to prevent desiccation, or drying out of the embryo. The amniotic membrane surrounds the fluid-filled amniotic sac, providing a watertight environment for the developing embryo. This adaptation allowed reptiles and birds, which lay amniotic eggs, to colonize dryer environments and avoid competition with amphibians and other non-amniotic egg-laying species.

The Amniotic Egg Evolved as an Adaptation