Whereas Earth has only one satellite (aka. the Moon), Mars has two small moons: Phobos and Deimos. And whereas the vast majority of moons in our Solar System are large enough to become round spheres similar to our own Moon, Phobos and Deimos are asteroid-sized and misshapen in appearance.
Microorganisms, like certain bacteria and yeasts, living on the human skin or in the nose, mouth, throat, small and large intestine and vagina, are part of the normal human flora; they prevent overgrowth of harmful microorganisms. Some of these microbes, when overgrow, may become pathogenic, though.
Custom Search. What are Virus,Fungus,Bacteria. Virus: Viruses are micro organisms which cause various diseases in all types of living bodies, so much so that even bacteria are affected by viruses. There ia a helpful virus called bacteriophage which eats bacteria and can not be seen by necked eye.acteria are both harmful and useful. They spread many disease in human beings, animals and plants. Typhoid tetanus, T.B., cholera, diphtheria, dysentry, whooping cough etc. are some of the well-known diseases which are spread by bacteria.