Viruses, bacteria, many fungi, few
algae and all protozoa are classified as microorganisms. The science which
deals with their studies is called micro biology. Microorganisms are very small
in size and can be seen with the help of a microscope. Microorganisms are
unicellular, but a few are multicellular. They are found everywhere, in air,
water, soil an the food we eat. They are present on our body surface,
alimentary canal, mouth, nose and other body parts.
Microorganisms affect the welfare of
mankind in many ways, some are beneficial and others are harmful spoiling our
food, water and cause diseases in mankind. Some of the microorganisms cause
great damage to paper, textiles and other house hold items
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