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GCE Biology 1990 Question 38

Question 38

Nutrient Cycling

Thunderstorm can be beneficial to plants because it

  1. A.kills the pest that attacks crops
  2. B.destroys some of the major crops
  3. C.adds nitrates to the soil
  4. D.adds lime to the soil
  5. E.makes rain water available to plants
Show the answer and explanation

Answer: C (adds nitrates to the soil)

Explanation

Lightning joins nitrogen and oxygen into oxides that rain washes into the soil as nitrates.