Biology
What is the outer skeleton of organisms such as spiders and insects called?
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What do we call things that directly affect all activities of cells?
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What is a reddish-orange pigment found in fruits, vegetables, and other plants?
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What is the nerve that helps transmit sound signals to your brain?
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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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Which glycoprotein is mainly responsible for recurring outbreaks of influenza?
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What type of plants always contain a xylem and phloem?
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