how are the actions of microorganisms useful and harmful for us ?
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Hlo mate here is ur ans. .....
Some bacteria transforms harmful substances into simpler harmless substitutes. Some microorganisms are harmful and even cause diseases in both plants and animals. They helps in decaying fruits, vegetables and other food items in plants. In human, it can cause many diseases such as typhoid, diarrhea, cholera etc...
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microorganisms like fungi is used to make penicillin u, a drug used to treat number of disease. streptromycin,tetracyclin and erythomycin are some other commonly used antibiotics.
microorganisms are harmful because it causes many disease like malaria, cholera, tuberculosis etc..... they can cause serious illness.
so, micro organisms are useful also and harm ful also.
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