User:Bomber1705/Prokaryotic cell
From Wikipedia, the free encyclopedia
It is called prokaryote to cells without a defined cell nucleus, whose genetic material is dispersed in the cytoplasm, assembled in a zone called nucleoid. In contrast, cells that do have a differentiated nucleus of the cytoplasm are called eukaryotes, ie those whose DNA is inside a compartment separated from the rest of the cell.
In addition, the term prokaryotic refers to organisms belonging to the Prokaryota empire, whose concept coincides with the Monera kingdom of the classifications of Herbert Copeland or Robert Whittaker which, although earlier, still remain popular.
Almost without exception, organisms based on prokaryotic cells are unicellular (organisms consisting of a single cell).
It is believed that all organisms that currently exist derive from a prokaryotic unicellular form (LUCA). There is a theory, serial endosymbiosis, which considers that throughout a slow evolutionary process, about 1500 million years ago, the prokaryotes became more complex beings by symbiotic association: eukaryotes.