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JAMB Biology 1990 Question 50

Question 50

Nutrient Cycling

Free nitrogen is released to the atmosphere by

  1. A.Nitrogen- fixing bacteria
  2. B.nitrifying bacteria
  3. C.denitrifying bacteria
  4. D.saprophytic bacteria
Show the answer and explanation

Answer: C (denitrifying bacteria)

Explanation

Denitrifying bacteria break down nitrates and release nitrogen gas back into the air.