क्या है ये micro-organism?

Substance produced by the micro organism and which can inhibit the growth of other micro-organisms is

Fermentation is conducted by all micro - organisms.

What are the major groups of micro - organisms?

The disease kala-azar is caused by a micro-organism know as :

Explain the role of three micro-organisms as biocontrol agents.

What are micro - organisms ? Give any two examples of micro organisms.