The document outlines the key characteristics and groups of five classes of vertebrates: fish, amphibians, reptiles, birds, and mammals. It discusses their defining physical attributes and provides examples of common types within each class, such as how fish have fins and scales, amphibians have both lungs and gills, and birds have feathers and hollow bones that enable flight. The document aims to teach students about the distinguishing features of different vertebrate organisms.

1. UNIT 6: VERTEBRATES

3. VERTEBRATES

17. FLOCK OF STARLINGS IN SPRING

22. VERTEBRATES BONY CARTILAGINOUS URODELA ANURA TURTLES LIZARDS SNAKES CROCODILES CARINATAE RATITES MONOTREMES MARSUPIALS PLACENTAL