What is the main advantage of the amniotic egg?
a. it protects the embryo from predators
b. it allows gas exchange while preventing water loss
c. it allows the dispersal of the species, traveling long distances
d. it attracts other organisms to disperse the embryo

b. It allows gas exchange while preventing water loss

Explanation:

Amniotic eggs are the feature of land animals such as reptiles, birds, mammals, etc. The amniotic eggs have four extra-embryonic membranes. This semipermeable protective shell allows the exchange of respiratory gases but does not support the transport of water out of the egg.

The ability to maintain the water inside the egg while permitting gaseous exchange is the specific feature of amniotic eggs and allowed diversification of land animals in the land habitats.

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