WAEC Biology 1992 Question 36

Question 36

Nutrient Cycling

Which of the following bacteria reduces nitrates in the soil to gaseous nitrogen?

  1. A.Putrefying bacteria
  2. B.Nutrifying bacteria
  3. C.Saprophytic bacteria
  4. D.Denitrifying bacteria
  5. E.Parasitic bacteria
Show the answer and explanation

Answer: D (Denitrifying bacteria)

Explanation

Denitrifying bacteria turn nitrates back into nitrogen gas.