Question

How are micro organisms udefull to us???(5 marks)

Answer 1

they stop our bleeding

Answer 2

production of milk products- lactobacilli convert lactose into lactic acid. which is nothing but curd.

they convert dead organisms into useful mineral. i.e. they maintain the balance of nature by process of decomposition.

they also help in making alcohol and idli or dosa batter by process of fermentation.

bacterias like rhizobium and cyanobacteria help in fixation of atmospheric nitrogen, something very essential for plants.

certain bacteria under some conditions produce ethanol and methane which can be used as bio-fuel

they help in production of antibiotics and vaccines.

microbes in our intestine help in digestion. in small babies it helps in digesting milk and in rhuminants it breaks down cellulose of grass.