Internal fertilization, amniotic egg, and skin that resists drying evolved in which group?

The correct answer is related to the adaptations that allow for successful reproduction and life on land. Internal fertilization, the development of the amniotic egg, and skin that resists drying are key traits that have evolved in reptiles.

Internal fertilization is crucial for terrestrial environments where water is scarce. It allows for sperm to fertilize the egg inside the female's body, reducing the risk of desiccation compared to external fertilization commonly seen in amphibians.

The amniotic egg is another significant adaptation that provides a protective environment for the developing embryo. This type of egg has specialized membranes, including the amnion, which creates a fluid-filled cavity that cushions the embryo and helps retain moisture. This adaptation is necessary for survival in terrestrial habitats since it prevents the egg from drying out.

Furthermore, the skin of reptiles is keratinized and has scales that help minimize water loss, allowing them to thrive in dry environments. These adaptations collectively facilitated the transition from an aquatic to a more terrestrial lifestyle for reptiles.

In contrast, amphibians typically require a moist environment for reproduction and do not have these adaptations to the same extent. Aves, while they do have many of these adaptations, have specific adaptations related to flight and feathers. Chondrich