question_answer

  Complete the following cycle and answer the given questions.       (a)What will happen, if the step D does not occur? (b) State two free living nitrogen fixing bacteria.

Answer:

            A? Ammonificarion B?Nitrites C?Nitrate                             D?Denitrification    If step D does not occur then there will be no replenishment of atmospheric nitrogen.      (b) Azotobacter and cyanobacteria.