Biology

What substance in your ears helps keep germs and dirt out?

More Questions from Biology
What is group of cells that work together and form an organ called?
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Which animals have gills?
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What are scientists who study animals called?
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Which of the following human traits can be used, like fingerprints, for identification?
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What gas do plants take in that humans give off when they breathe?
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What adjective means belonging to or associated with a flower?
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Which of these is a plant native to Asia?
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Lithium is used to treat which of the following?
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