Nitrification ____.
A) converts ammonium into nitrates
B) reduces nitrates to nitrites
C) converts nitrogenous compounds into free nitrogen
D) converts atmospheric nitrogen to ammonia
E) reduces ammonia to ammonium

Question

Nitrification ____.  
A) converts ammonium into nitrates
B) reduces nitrates to nitrites
C) converts nitrogenous compounds into free nitrogen
D) converts atmospheric nitrogen to ammonia
E) reduces ammonia to ammonium

Quizplus · Accepted Answer

Nitrification is the biological process that converts ammonium into nitrates through the action of two types of bacteria, Nitrosomonas and Nitrobacter. Nitrosomonas converts ammonium to nitrite, and Nitrobacter further oxidizes nitrite to nitrate. Therefore, option A is the correct choice.