Why are micro-organisms called decomposers?

What are micro-organisms?

Which organism is a decomposer?

Why bacteria and fungi called decomposers?

True or False Fermentation tank where fermentation is carried out in the presence of micro-organisms is called bioreactor.

Why are living organisms classified?

Antibiotics are those chemicals which are obtained from the useful micro-organisms and are employed to kill some harmful micro-organisms. But all the antibiotics donot have medicinal importance. Discuss the following: Discovery of penicillin was a serendipity. Why it is called so?