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Preparation of curd ,cheese from milk is due to bacterial action .
Production of vinegar,wines and alcohol from fruit juice is helped by bacteris.
Bacteria make meat soft by breaking down tough mu dfdfdfscle fibres.
Bacteria present in the intestines of cows,buffaloes etc.help digestion of grass and plants by breaking down cellulose present in them.
Symbiotic bacteria living in the root nodules of the leguminous plants absorb atmospheric nitrogen and convert into nitrogenous compounds .