The driving force in evolving cellular life on Earth has been horizontal gene transfer, in which the acquisition of alien cellular components, including genes and proteins, works to promote the evolution of recipient cellular entities. This is the theory of Carl Woese, a microbiologist at the University of Illinois at Urbana-Champaign.
Woese presents his theory of cellular evolution, which challenges long-held traditions and beliefs of biologists, in today's issue of the Proceedings of the National Academy of Sciences Full Article: http://unisci.com/stories/20022/0618021.htm
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