Biology

What is the outer skeleton of organisms such as spiders and insects called?

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What does the zygote form once it starts mitosis?
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Approximately how far can a lion's roar be heard?
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What natural biological defense system protects the body from disease and fights off germs?
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What type of creature generally lives on land but starts life in the water?
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How many bones are in each finger, except the thumb, of a human hand?
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Which of the following does NOT grow on a tree?
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Which of these animals does not typically hibernate?
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What grows from an acorn?
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