35. Soil
Nitrogen Fixation
Multiple Choice
Multiple ChoiceNitrogen fixation is __________.
A
the use of nitrogen to build molecules such as proteins and nucleic acids
B
the recycling of nitrogen from organic matter in the soil
C
the absorption of N2 from the soil
D
performed by fungi inhabiting root nodules
E
the conversion of nitrogen gas in the air to a form usable by plants
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