Eukaryota

Eukariota, from the Greek eu, true, and karyon, nut, here in reference to nucleus, in scientific classification, is a domain formed by all living beings composed by cells where there is a nucleus, with various organelles, enclosed by a membrane that separates its content from the surrounding cytoplasm. These organisms vary since unicellular to very complex individuals with many different types of cells carrying particular functions.

Almost all living beings belong to Eukariota, except Bacteria and Archaea, which are the two other domains of organisms, beside the viruses, that are not constituted by cells. Domain Eukariota is divided in kingdoms: Animalia, Plantae, Fungi, Chromalveolata, Amoebozoa, Rhizaria and Excavata.