The atmosphere contains about 80% nitrogen gas, but nitrogen in this form cannot be used by plants. Which of the following processes converts atmospheric nitrogen to a useful form for plants?
A. nitrogen decomposition
B. nitrogen fixation
C. photosynthesis
D. transpiration

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Answers

2014-10-27T12:11:33+08:00
2014-10-30T10:57:40+08:00
I guess that is letter c. photosynthesis
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