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Q90
(CGS/2026)
Environment & Ecology › Ecology & Ecosystem Basics
The conversion of nitrogen to ammonium by bacteria and cynobacteria is called
Result
Your answer:
—
·
Correct:
D
Explanation
The biological process of converting atmospheric nitrogen (N2) into ammonia (NH3) or ammonium (NH4+) is known as nitrogen fixation. This is primarily carried out by specialized nitrogen-fixing bacteria (such as Rhizobium and Azotobacter) and cyanobacteria (such as Anabaena and Nostoc).
- Nitrification is the two-step process of converting ammonia into nitrites (NO2-) and then into nitrates (NO3-).
- Denitrification is the conversion of nitrates back into gaseous nitrogen (N2), completing the cycle.
- Ammonification refers to the conversion of organic nitrogen (from dead plants and animals) into ammonia by decomposers.
Since the specific process described is nitrogen fixation, and it is not listed in options A, B, or C, the correct answer is None of the above.
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