Question

differentiate the nature of skin in 4 classes of tetrapoda?

Answer 1

The superclass Tetrapoda (from Greek: τετρα- "four" and πούς "foot") contains the four-limbed vertebrates known as tetrapods (/ˈtɛtrəpɒds/); it includes living and extinct amphibians, reptiles (including dinosaurs, and its subgroup birds) and mammals (including primates, and all hominid subgroups including humans), as well as earlier extinct groups. Tetrapods evolved from a group of animals known as the Tetrapodomorpha, who in turn evolved from ancient Sarcopterygii lobe-finned fishes around 390 million years ago in the middle Devonian period;[2] their forms were transitional between lobe-finned fishes and the four-limbed tetrapods.