Chapter 41 Reptiles Characteristics of Reptiles Ectotherm thick, dry, scaly, waterproof skin (prevents animal from drying out or injury) 4 legs w/claws (claws used for digging, climbing, running) vary in size, shape, color live on every continent except Antarctica
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225 million to 65 million years ago
*these make up the largest group of reptiles
unhinge their jaw & slide their mouth slowly over prey; teeth help hold prey in position
- hemotoxin: destroys blood cells, usually causes death in 48 hours or less ex; rattlesnake, cottonmouth, copperhead
Some snakes desired by farmers because they eat rodents ex milk snake, hog nose, rat snake