Term | Definition |
Bacteria | In a modern taxonomic system, a domain made up of prokaryotes that usually have a cell wall and that reproduce by cell division; this domain aligns with the traditional kingdom Eubacteria. |
Archaea | Prokaryotes, most of which are known to live in extreme environments; differentiated from other prokaryotes by genetic differences and differences in the make up of their cell walls. |
Eukarya | In a modern taxonomic system, a domain made up of all eukaryotes; aligns with the traditional kingdoms Protista, Fungi, Plantae, and Animalia. |
Eubacteria | In a traditional taxonomic system, a kingdom that contains all prokaryotes except Kingdom Archaebacterial (Domain Archaea); biologists more recently prefer to classify these organisms as Domain Bacteria. |
Archaebacterial | In taxonomic system, a kingdom made up of prokaryotes that can live in extreme environments; differentiated from other prokaryotes by various important chemical differences; biologists more recently prefer to classify these organism as Domain Archaea. |
Protista | In a traditional taxonomic system, a kingdom made up of mostly one-celled eukaryotic organisms that are not readily classified as either plants, animals, or fungi. |
Fungi | In a traditional taxonomic system, a kingdom made up of non-green, eukaryotic organisms that get food by breaking down organic matter and absorbing the nutrients, reproduce by means of spores, and have no means of movements. |
Plantae | In taxonomic system, a kingdom made up of eukaryotic, multicellular organism that have cell walls made mostly of cellulose, that have pigments that absorb light, that supply energy and oxygen to themselves and to other life-forms through photosynthesis. |
Animalia | In a traditional taxonomic system, a kingdom made up of complex, multicellular organisms that lack cell walls, are usually able to move around, and possess specialized sense organs that help them quickly respond to their environment. |