Question

whether microorganisms are useful or harmful explain how

Answer 1

... Micro organisms , though a large number can cause diseases in plants and animals , including humans . But all microbes arent harmful. a number of microbes are very useful, particularly in industries , agriculture and medicine. In fact, their beneficial effects are far more than the harm they cause.


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Answer 2

They are both useful and harmful because the help in the production of vaccines,formation of curd,medicines,vinegar,alcohol etc 
they cause diseases etc.....
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