Systematik (biologi): Forskelle mellem versioner

* Signe Frederiksen, Finn N. Rasmussen og Ole Seberg: ''De højere planters evolution og klassifikation'', 1997. ISBN 87-12-03087-2.

* [http://www.sciencedaily.com/releases/2005/07/050703232326.htm 2005-07-05, Sciencedaily: Trees, Vines And Nets -- Microbial Evolution Changes Its Face] Citat: "... EBI researchers have changed our view of 4 billion years of [[mikrobe|microbial]] evolution ... In all, more than 600,000 vertical transfers are observed, coupled with 90,000 [[gen]]e loss events and approximately 40,000 horizontal gene transfers ... A few species, including beneficial nitrogen-fixing soil bacteria, appear to be 'champions' of horizontal gene transfer; "it's entirely possible that apparently harmless organisms are quietly spreading [[antibiotika|antibiotic]] resistance under our feet," concludes Christos Ouzounis ..."