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baherus [9]
3 years ago
12

Question in pic, will give brainliest!

Biology
1 answer:
Leokris [45]3 years ago
7 0
Ammonium is converted to nitrite ions (NO2 -) by soil bacteria like Nitrosomonas. Bacteria then convert nitrites into nitrate ions (NO3 -)
It directly converts to NO2 and then that NO2 converts to NO3. This no3 then converts to N2 (gas). So second and fourth option i think
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