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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