Question 7

Write 10 lines on the usefulness of microorganisms in our lives.

Answer

Microorganisms are useful for the human beings and the plants in the following ways:

  1. Rhizobium bacteria increase fertility of soil by fixing free nitrogen of atmosphere.
  2. Lacto bacillus bacteria helps in making the curd of the milk.
  3. Mushrooms are edible fungi.
  4. Antibiotics like penicillin are made from fungi.
  5. Yeast is used in the preparation of the alcohol, wine and beer etc.
  6. Some bacteria are used for tanning of leather.
  7. Bacteria and fungi are decomposers and acts as natural cleansing agents.
  8. Blue- green algae increase the fertility of the soil.
  9. Yeasts are useful in making idli, dosa, processed cheese, pizza dough etc.
  10. Microorganisms make compost manure.

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