Question

What problem does the amniotic egg solve (hint: what key feature do Amphibian eggs need to develop)?

a) Lack of yolk
b) External fertilization
c) Dependency on water for reproduction
d) Lack of protective shell

Answer 1

The amniotic egg solves the issue of dependency on water for reproduction by providing protection and sustenance for the developing embryo on land, which allows amniotes to inhabit drier environments.

Step-by-step explanation:

The problem that the amniotic egg solves is the dependency on water for reproduction. In contrast to amphibian eggs, which need to be laid in water to prevent drying out, the amniotic egg allows for terrestrial reproduction. The shell of the amniotic egg provides protection for the developing embryo, as well as being permeable enough for gas exchange. The presence of the amniotic cavity provides an aquatic-like environment for the embryo, the yolk serves as a food source, and other membranes assist with waste management and respiration, all allowing the egg to develop on land. This adaptation lessens the dependence on a watery environment and enables amniotes to inhabit drier areas, significantly distinguishing them from amphibians.