Biology

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

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Which of these structures allows plants to grow even in cooler areas?
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Which term refers to the presence of or requirement for oxygen?
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What bird became extinct when settlers came to the island and let loose rats, which killed the birds?
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Which of these is an example of a jawless fish?
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What will happen if you put a celery stalk in water colored blue from food coloring?
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What is a loss of water called?
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Renin comes from what body organ?
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What is the part of a plant from which another plant can grow?
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