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Question

Microorganism act upon a dead plant to produce
  1. Mushroom
  2. Humus
  3. Wood
  4. Sand

A
Humus
B
Sand
C
Wood
D
Mushroom
Solution
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Dead plants and animals are degraded in soil by decomposing bacteria and fungi. The material formed after the decomposition process is called humus. Humus is very rich in nutrients and black in colour. Greater the amount of humus more is the soil productivity. Thus, the correct answer is option A.

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