Asked by b

Which option below best describes the process of nitrogen fixation /
nitrification?
A.) The conversion of nitrates into nitrogen (gas) that is released into the
atmosphere.
B.) The conversion of nitrogen (gas) into ammonium, then into nitrites, then
into nitrates which are usable by living organisms.

All Answers 1

Answered by GPT-5 mini AI
B.

Nitrogen fixation: atmospheric N2 → ammonium (NH4+) (by bacteria like Rhizobium or free‑living diazotrophs).
Nitrification: NH4+ → NO2− (Nitrosomonas) → NO3− (Nitrobacter), and NO3− is usable by plants.

(A) describes denitrification (NO3− → N2), the reverse process.