Biological Classification - The Eight Classes of the Subphylum Vertebrata

The video tutorial explains the classification of vertebrates into eight classes: Agnatha, Placodermi, Chondrichthyes, Osteichthyes, Amphibia, Reptilia, Aves, and Mammalia. Each class is described with its unique characteristics, such as jawless fish in Agnatha, extinct jawed fish in Placodermi, cartilaginous fish in Chondrichthyes, bony fish in Osteichthyes, amphibians with aquatic larvae, reptiles with dry skin, birds with feathers, and mammals with hair and live birth.

Explain the life cycle and habitat of amphibians.

What are the unique features of mammals compared to other vertebrates?