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Question
Unlike amphibians, reptiles do not require free water for reproduction, because they have ____________ eggs.
Unlike amphibians, reptiles do not require free water for reproduction, because they have ____________ eggs.
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Solution
The correct option is A amniotic
Animals producing shelled eggs is a big evolutionary step as it allowed the eggs to be dry. Shelled eggs are protected by amniotic membranes and are also known as amniotic eggs. The amnion is a membrane that is formed around the developing embryo of many animals including organisms in class Reptilia, class Aves and class Mammalia. Amniotic eggs contain albumin, which provides embryo with protein and water, and an egg yolk that supplies the embryo with energy. Eggs laid by amphibians do not have amniotic covering (anamniotic) and can dry out if it is laid on land. It, also, eliminates the tadpole stage in the life cycle of the animal. Hence, reptiles do not require water for reproduction.
Animals producing shelled eggs is a big evolutionary step as it allowed the eggs to be dry. Shelled eggs are protected by amniotic membranes and are also known as amniotic eggs. The amnion is a membrane that is formed around the developing embryo of many animals including organisms in class Reptilia, class Aves and class Mammalia. Amniotic eggs contain albumin, which provides embryo with protein and water, and an egg yolk that supplies the embryo with energy. Eggs laid by amphibians do not have amniotic covering (anamniotic) and can dry out if it is laid on land. It, also, eliminates the tadpole stage in the life cycle of the animal. Hence, reptiles do not require water for reproduction.
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