LIFE SCIENCE

Detailed explanation-1: -These animals have developed the amnion as a means of protecting their embryos from dehydration and desiccation. Therefore, we can conclude that Reptiles, birds (Aves) and mammals have amnion while Chondrichthyes, Osteichthyes and Amphibians lack the amnion and are known as anamniotes.

Detailed explanation-2: -Amniotes and Anamniotes are two vertebrates groups. The key difference between Amniotes and Anamniotes is that Amniotes are higher vertebrates including reptiles, birds, and mammals while anamniotes are lower vertebrates including fishes and amphibians.