Concept explainers
To write:
The correct term by replacing the given word in italics
Introduction:
Reptiles were the first completely terrestrial vertebrates and are fully adapted to live on land. Characteristics like scaly skin, circulatory and respiratory system and shelled egg allow them to succeed on land. They have common characteristics with other organisms such as the presence of an amnion and other membranes.
Explanation of Solution
An amnion is the membrane that surrounds a developing embryo. It is filled with protective fluids. An amniotic egg has a protective shell and has several internal membranes with fluids between the membranes. The embryo gets its nutrition from the yolk sac inside the egg. The amniotic fluid bathes the embryo within the amnion.
Thus, several membranes are inside an amniotic egg. The correct term for the given word in italics is an amniotic egg.
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