Concept
Version 7
Created by Boundless
Endosymbiotic Theory and the Evolution of Eukaryotes
Endosymbiosis in eukaryotes
The theory that mitochondria and chloroplasts are endosymbiotic in origin is now widely accepted. More controversial is the proposal that (a) the eukaryotic nucleus resulted from the fusion of archaeal and bacterial genomes; and that (b) Gram-negative bacteria, which have two membranes, resulted from the fusion of Archaea and Gram-positive bacteria, each of which has a single membrane.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"OpenStax College, Perspectives on the Phylogenetic Tree. October 16, 2013."
http://cnx.org/content/m44593/latest/Figure_20_03_03.jpg
OpenStax CNX
CC BY 3.0.