Question Detail
Question
The transformation of nitrogen from ammonia to nitrite and to nitrate is called: A. nitrogen fixation B. denitrification C. ammonification D. nitrification
Correct Answer
Option D is the correct answer.
Detailed Explanation
Nitrification is a two-step aerobic process carried out by nitrifying bacteria. First, ammonia (NH3) is oxidized to nitrite (NO2-). Then, nitrite is oxidized to nitrate (NO3-), the form most readily taken up by plants.
Hint
It's the process of making 'nitrate' from 'ammonia'.