Compare heart and reproduction in 4 classes of tetrapoda
Answers
Explanation:
One of the key characteristics of tetrapods is that they have four limbs or,
If they lack four limbs, their ancestors had four limbs.
Tetrapods are four-limbed (with a few exceptions, such as snakes) animals constituting the superclass Tetrapoda. It includes extant and extinct amphibians, reptiles (including dinosaurs and therefore birds), and mammals. Tetrapods evolved from a group of animals known as the Tetrapodomorpha which, in turn, evolved from ancient sarcopterygians (lobe-finned fishes) around 390 million years ago in the middle Devonian period their forms were transitional between lobe-finned fishes and the four-limbed tetrapods. The first tetrapods (from a traditional, apomorphy-based perspective) appeared by the late Devonian, 367.5 million years ago