Biology

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

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What is an algal bloom that occurs in salt water called?
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In what season do the leaves of some trees turn colors and start falling to the ground?
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What is a young bear called?
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What is the fold of tissue that surrounds a mollusk's soft body?
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Which of the following is a signal that you are hungry?
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What kind of tree loses all its leaves during a dormant period like winter?
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What "trapdoor" on your windpipe helps keep out food particles?
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