Archaea Eocyte Tree

According to the Tree of Life Web Project, two alternative views on the relationship of the major lineages (omitting viruses) are currently regarded as viable (right - click to enlarge image).

Endosymbiotic transfer events

Right - click to enlarge image: Proposed endosymbiotic transfer events between the three Domains and the six Kingdoms of Life.

Both the Eubacteria and Archaea are prokaryotes, while animals, fungi, plants, and protists are eukaryotes.

The yellow asterisk * indicates the last universal common ancestor (LUCA), or universal cenancestor, which is hypothesized as being at the ancestral root of all living organisms. Not the earliest or simplest living organism, and not necessarily the sole example of its type, this organism possessed the genetic material that diverged (about 3.5 Ga) into all current living organisms. A number of terms are employed to refer to the universal cenancestor – last universal ancestor (LUA), last common ancestor (LCA), or last universal common ancestor (LUCA).