Biology
What is the outer skeleton of organisms such as spiders and insects called?
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Which term refers to the presence of or requirement for oxygen?
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What is the nerve that helps transmit sound signals to your brain?
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Some insects in the north produce what chemical to serve as a natural antifreeze in the winter?
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Which animal was mistaken for the source of the bubonic plague?
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What can be made from the particles of a dead virus to prevent the disease caused by that virus?
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