Eukaryote biology

living structure of cytoplasm that contains many nuclei

hypothesis that the eukaryotic cell nucleus evolved from a large DNA virus in a form of endosymbiosis within a methanogenic archaeon

thumb|upright=1.35|LUCA and LECA: the origins of the Eukaryote|eukaryotes. The point of fusion (marked "?") below LECA is the FECA, the first eukaryotic common ancestor, some 2.2 billion years ago. Much earlier, some 4 billion years ago, the LUCA gave rise to the two domains of prokaryotes, the [[bacteria and the archaea. After the LECA, some 2 billion years ago, the eukaryotes diversified into a crown group, which gave rise to animals, plants, fungi, and protists.]]