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Question

Write a short paragraph on the harms caused by microorganisms.


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Solution

Microorganisms:

  1. Microorganisms are minute organisms of microscopic size.
  2. Cosmopolitan in nature (present everywhere).

Harmful effects of microorganisms:

Food spoilage:

  1. If we left the bread in moist condition, it gets spoilt by the fungus (Rhizopus stolonifer)
  2. Produce a white cotton-like growth on bread and leads to food poisoning.

Spreading of diseases:

  1. Causes diseases in animals. For example - Rabies is caused by the rabies virus.
  2. Causes diseases in humans like tuberculosis (Mycobacterium tuberculosis), cholera (Vibrio cholerae), typhoid (Salmonella typhi), etc.

Disinfecting the surfaces:

  1. Anaerobic bacteria reside in dirty places like stagnant water.
  2. Act as the carrier of dirt on food that is kept open.
  3. Clostridium botulinum produces harmful and poisonous substances where it resides.

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