Tree of life
A phylogenetic tree of living things, based on rRNA data, showing the separation of bacteria, archaea, and eukaryotes. Trees constructed with other genes are generally similar, although they may place some early-branching groups very differently, thanks to long branch attraction. The exact relationships of the three domains are still being debated, as is the position of the root of the tree. It has also been suggested that due to lateral gene transfer, a tree may not be the best representation of the genetic relationships of all organisms.
(Replacing en:Image:Tree_of_life.jpg) Original creator User:Samsara.Relevantní články
18S rRNA18S rRNA je eukaryotická ribozomální RNA, která se vyskytuje v malé ribozomální podjednotce ribozomu. Název 18S je odvozen z sedimentační konstanty pro tuto molekulu, která má na délku u savců o něco méně než 1900 párů bází. Jejím protějškem je u bakterií 16S rRNA. .. pokračovat ve čtení