Get the answers you need from a community of experts on IDNLearn.com. Ask anything and receive prompt, well-informed answers from our community of knowledgeable experts.
Answer:
Vertebrates are further classified according to several criteria like exoskeleton, respiratory organs, method of giving birth, number of chambers in heart, mode of living etc. They are further classified into classes Pisces, Amphibia, Reptilia, Aves and Mammals