Question

chapter microorganisms friends and foes short notes

Answer 1

An organism that is too small to be seen by the unaided eye, especially a single celled organism, such as a bacterium is called microorganism.

Microorganisms are classified into four major groups. These groups are bacteria, fungi, protozoa and some algae.

Viruses are also microscopic. They, however, reproduce only inside the cells of the host organism, which may be a bacterium, plant or animal