Internal fertilization,leathery amniotic eggs,and skin that resists drying are characteristics of which extant vertebrate group?

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Internal fertilization, leathery amniotic eggs, and skin that resists drying are all characteristics shared by non-bird reptiles, such as snakes, lizards, turtles, and crocodilians. Amphibians lay eggs in water, chondrichthyans (sharks and rays) have internal fertilization but lay eggs with leathery shells, mammals have internal fertilization and give birth to live young, and birds have hard-shelled amniotic eggs but lack leathery shells and do not have skin that resists drying.

Internal Fertilization,leathery Amniotic Eggs,and Skin That Resists Drying Are Characteristics