Carbon, hydrogen, oxygen, and nitrogen make up approximately what percentage of most living organisms?
A) 25%
B) 47%
C) 82%
D) 96%
E) 100%
Correct Answer:
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Q16: According to the first law of thermodynamics,
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A)a battery.
B)a
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Q21: In open water, the dominant producers are
A)trees.
B)ferns.
C)fish.
D)grasses.
E)phytoplankton.
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A)converts glucose into energy and water.
B)requires the
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A)volcanic eruptions.
B)small pieces
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