vertebrates, have backbones, invertebrates, do not have backbones, fish, live in water, have gills, most lay eggs in water, amphibians, live part of life in water and part on land, reptiles, breathe with lungs, have scales or plates, most lay eggs on land, birds, have feathers, beak, two feet, two wings, mammals, have hair or fur, breathe with lungs, live birth drinks milk, cold blooded, cannot regulate their own body temperature , insects, three-part bodies, usually two pairs of wings, and three pairs of legs, and two antennae, warm-blooded, can regulate own body temperatures.

Classifying Animals

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恢復自動保存: ?