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Minute living organisms which can't be seen with our naked eye these r omni present,these r majorly remain active at required physiological conditions whereas some required host to get activated this majorly include bacteria,viruses,protozoans,n most of microscopic fungi n algae

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Microorganisms have adapted to inhabit almost every corner of the world. They live in the oceans and lakes, where they provide a valuable food source for larger organisms.microorganisms cause disease in humans. Bacteria and fungi can be parasites of humans, causing anything from food poisoning to athletes foot to malaria. Living organism such as a bacteria, fungi, viruses too small to be seen with naked eye but visible under a microscope.its called micro organisms....
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