Microorganisms can be found everywhere, in the coldest or hottest environment, in the air, in water, in soil, in plants, and even inside the human body. These organisms have a big contribution to the ecosystem and to the biosphere as a whole. They have existed even before the earth was habitable for other organisms such as plants and animals. In fact, studies have shown that all organ... https://www.cd-genomics.com/microbioseq/microorganisms-fact-sheet-definition-types-and-importance.html