The organisms can be divided into three domains, based on the type of cell that the organism is made of:
<span><span>Bacteria domain: cells do not contain a nucleus. </span><span>Archaea: cells don't contain a nucleus and they have a different cell wall from bacteria.</span><span> Eukarya: </span></span>They keep their genetic material inside the nucleus. Composed by animals, protists, plants and fungi
