Bacteria (Bacteria; Bacteria; / bæktɪəriə / singular: bacterium) is a type of single-celled microorganism.

Bacteria (Bacteria; Bacteria; / bæktɪəriə / singular: bacterium) is a type of single-celled microorganism.
These and (arqiara) are prokaryotes (pre-centric), meaning there is no nucleus in their cells, there is an unstable nucleoid, in which the linear chromosomes do not have circular DNA, there is no graft between the membrane and there is no cytokankal. The human body has few trillion cells, but the number of bacteria is 10-100 times higher. A variety of bacteria can usually be separated by a village stain.
One village can have 40 million and one milliliter of water can contain 1 million bacterial cells. There are about 5 × 1030 bacteria in the world.

Thanks you........