Question

level 2
q1
the process by which ammonium gets changed into nitrates by bacteria is called
a. denitrification
b. nitrogen fixation
c. eutrophication
d. nitrification

Explanation:

Denitrification converts nitrates to nitrogen gas; nitrogen fixation converts atmospheric nitrogen to ammonia; eutrophication is nutrient enrichment causing algal blooms; nitrification is bacteria converting ammonium to nitrates.

Answer:

D. Nitrification