Multiple choice

Which of these is not a step involved in the nitrogen cycle?

  1. Fixation

  2. Ammonification

  3. Photosynthesis

  4. Nitrification

  5. Denitrification

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The main driving factor of the oxygen cycle is Photosynthesis, which is responsible for the modern Earth's atmosphere and life on earth.