MCQOPTIONS
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MCQOPTIONS
| 1. |
Nitrogen fixation |
| A. | changes the free nitrogen (N2) to a form usable by plants |
| B. | especially changes nitrogen compounds, mostly amines such as NH2 |
| C. | both (a) and (b) |
| D. | fix the free nitrogen (N2) by which it should not be usable by plants |
| Answer» D. fix the free nitrogen (N2) by which it should not be usable by plants | |