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WAEC Biology 1991 (August) Question 43

Question 43

Soil

The role of dead organic matter in the soil is to

  1. A.make the soil black
  2. B.increase the mineral salt content
  3. C.provide food for all living organisms
  4. D.increase the acidity of soil
  5. E.make the soil more porous
Show the answer and explanation

Answer: B (increase the mineral salt content)

Explanation

Decomposers break down dead organic matter (humus), releasing mineral salts into the soil.