Advantages and Disadvantages of Micro-organisms


 
 
Concept Explanation
 

Advantages and Disadvantages of Micro-organisms

Microorganisms include bacteria, protozoa, algae and fungi. Although viruses are not considered living organisms, they are sometimes classified as microorganisms.

Advantages of Microorganisms :-

  • They help in production of food materials such as bread, cheese, curd,etc.
  • Helps in preparation of vaccine.
  •  Helps in fermentation.
  •  Serves as an important part of carbon and nitrogen cycle.
  • Disadvantages of Microorganisms :-

  • Responsible for rotting of food.
  • Responsible for tooth decay.
  • They spread diseases.
  • Are sometimes responsible for whooping of plants.
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    Sample Questions
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    Question : 1

    Column I                                    Column II

    A. Virus                                    P. Fungus which is used to make a drug.

    B. Cyanobateria                         Q. A kind of protozoan

    C. Plasmodium                          R. They are bacteria having chlorophyll

    D. Spirogyra                              S. An ultramicroscopic organism that is visible only through electron microscope.

    E. Penicillium                             T. Green filamentous alga commonly found in fresh water habitats.

    Right Option : A
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    Explanation
    Question : 2

    Microorganisms help in the production of _________________.

    Right Option : D
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    Explanation
    Question : 3

    Bacteria reduces soil fertility by _______________

    Right Option : A
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    Explanation
     
     
     
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