Where do plants get most of their mass?
A) from carbon dioxide in the atmosphere
B) from nitrogen in the atmosphere
C) from water,as van Helmont predicted
D) from organic molecules taken up from the soil
Correct Answer:
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Q30: On a trip to the Southwest,you and
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Q32: The existence of a hydrostatic pressure gradient
Q33: Nitrogen fixation consists of
A)the conversion of ammonia
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Q36: Carnivorousness in plants is primarily an adaptation
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Q40: Why has drip irrigation been developed?
A)Drip irrigation
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