Biology

Which term refers to the presence of or requirement for oxygen?

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What grows from an acorn?
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What adjective means belonging to or associated with a flower?
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What forms the outer boundary of a cell and controls material moving in and out of the cell?
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Which of these is a part of blood?
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Which of these is a kingdom in the classification of living things?
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What body covering do mammals have that other animals do not?
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What happens to your skin's blood vessels as you exercise?
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Which of the following is biologically classified as an insect?
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