Why is the amniotic egg considered a key evolutionary innovation?
a. It enables eggs to float in an aquatic medium.
b. It greatly increases the survival probabilities of eggs in a terrestrial environment.
c. It extends embryonic development.
d. It prohibits external fertilization, thereby facilitating the evolutionary innovation of internal fertilization.
e. It has a shell with a single membrane.
Ans: b. It greatly increases the survival probabilities of eggs in a terrestrial environment.
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