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12 Cards in this Set
- Front
- Back
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behavior
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the way a living thing acts
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instinct
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behavior that an animal is born with and does not need to learn
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reflex
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simple,automatic behavior
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stimulus
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the cause of a behavior
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response
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a behavior caused by a stimulus
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mammal
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an animal with a backbone that usually has hair on its body and feeds milk to its young
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reptile
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animal with a backbone that has a dry, scaly skin
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gills
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organs for breathing found in fish and amphibians
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amphibian
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one of the large group of animals with backbones that live part of their lives in water and part on land
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exoskeleton
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a hard outer covering that supports and protects some animals without backbones
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molt
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to shed an animal's outer covering
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backbone
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the main bone, made up of many small bones joined together, that runs along the middle of the back in some animals
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