In the nitrogen cycle, which process converts ammonium ions in the soil into nitrate ions?
Answer and explanation
Correct answer: D. nitrification by nitrifying bacteria
- Step 1: Ammonium is oxidised to nitrite by Nitrosomonas, and nitrite to nitrate by Nitrobacter.
- Step 2: This oxidation process is nitrification.
Answer
nitrification by nitrifying bacteria.
Why not the others: denitrification by denitrifying bacteria: converts nitrate to nitrogen gas. nitrogen fixation by Rhizobium: converts nitrogen gas into ammonia. ammonification by decomposers: converts organic nitrogen compounds into ammonium.
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