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WAEC Biology 2019 Question 28

Question 28

Nutrient Cycling

The conversion of ammonium salts into nitrates is called

  1. A.putrefaction.
  2. B.denitrification.
  3. C.fixation.
  4. D.nitrification.
Show the answer and explanation

Answer: D (nitrification.)

Explanation

Nitrifying bacteria (Nitrosomonas and Nitrobacter) change ammonium compounds into nitrites and then nitrates. This is nitrification.