Question

micro organisms are friends as well as Foe

Answer 1

microbes are useful for making medicine,vaccines, testers, etc .
but they are harmful as well, since they cause many diseases and infections.
like Penicillium , Aspergillus etc are good for us and fungi like Rhizobium , paramoecium and parasites are harmful.

Answer 2

micro organisms are friends as well as foe cause earthworms are friends to the farmer. Some other are enemies like caterpillar ,etc...
May this answer help u.