Question

write ten lines on the usefulness of microorganisms in our lives

Answer 1

Microorganisms are useful in our lives in the following ways :
(i) Bacteria cause the decay of dead plants and animals.
(ii) Nitrogen fixing bacteria convert the atmospheric nitrogen into nitrates.
(iii) Bacteria are used in the production of vinegar, curd, cheese, etc.
(iv) Bacteria are used in sewage disposal plants.
(v) Scientists have discovered ways to change bacteria so that they produce valuable medical,

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Answer 2

 Microorganisms play animportant role in our life: helps us to digest our food, decompose wastes and participate in various cycles. ... There are more microorganismspresent in us than there are cells, and the various microorganisms are bacteria, viruses, fungi and protozoa.