This term can be summed up by the term “true bacteria”. The term used to be called domain but has been simplified. They are part of one of three types of cells that make up our world. They are known to be found one almost every surface of the entire world. Even in extreme situations such as artic tundra’s, desert floors, and even our house hold floors. They are some of the oldest cells on the planet and it is believed that they gave way to some of the more common bacteria known today.