Micro organisms

Micro organisms are tiny organisms which can not be seen with the naked eye except with the aid of microscope. The branch of biology which involves the study of organsims that are microscopic in sizes is called MICROBIOLOGY.
micro organisms are found everywhere, in the soil, air body water on our cloth just name it they are found everywhere. Some of the micro organisms are beneficial ,harmless or non pathogenic while other cause disease and are referred to s pathogenic and therefor harmful.
All micro organisms are grouped in to the following :(1).virus (2).bacteria (3).protozoa (4).fungi (5).algea.