Biology

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

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What is the opening in your eye called?
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How many bones are in each finger, except the thumb, of a human hand?
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What element are the bases of DNA mostly comprised of?
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Which pair of animal species and type is correct?
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What is the fin on the backs of fish, some whales and dolphins called?
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Lithium is used to treat which of the following?
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What is the condition called when the red blood cells are misshapen?
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What is an action that one animal uses to influence or inform another animal?
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