Biology

What "trapdoor" on your windpipe helps keep out food particles?

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How does an insect smell?
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What light-sensitive cells in the eye detect colors?
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Which of the following common foods originated in the tropics?
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Where are the female sex cells of a flower located?
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During which of the following biological phases does "crossing over" take place?
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Which of these places is a typical shelter for a raccoon?
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Which glycoprotein is mainly responsible for recurring outbreaks of influenza?
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