Provide general information about microbes.

(N/A) Besides macroscopic plants and animals,microbes are the major components of biological systems on this earth.
Microbes are present everywhere in soil,water,air,inside our bodies,and in the bodies of other animals and plants.
Microbes are present even at sites where no other life form could possibly exist - sites such as deep inside geysers where the temperature may be as high as $100^{\circ} C$,deep in the soil under layers of snow several meters thick,and in highly acidic environments.