Biology

What natural biological defense system protects the body from disease and fights off germs?

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Where would you find dragonfly eggs?
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Which of these animals has its shelter on its back?
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What is endocrinology?
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What characteristic could show that a bird might be ready to reproduce?
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What vertebrates are cold-blooded and have dry scaly skin?
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What part of a plant produces seeds?
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Which pair of animal species and types is correct?
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Which of these senses would you use to tell how hot the sidewalk was?
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