Biology

What is most of the oxygen that enters the human body taken in through?

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Bacterial infections in humans can be treated with what?
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What part of the blood helps clotting?
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What is a reddish-orange pigment found in fruits, vegetables, and other plants?
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What is the sprouting of a new plant structure called?
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Approximately how much does the large head of an Elephant seal weigh?
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What are large male gorillas often called because of the coloration of their hair?
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Where are red blood cells made?
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What element are the bases of DNA mostly comprised of?
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