Revision as of 23:47, 24 October 2006 view source Omicronpersei8 (talk \| contribs) 52,319 edits m Reverted edits by 66.169.61.178 (talk) to version 83492933 by Dave souza using VS ← Previous edit		Revision as of 01:08, 25 October 2006 view source Random Replicator (talk \| contribs) 1,924 edits →Mechanisms of evolution: Deleted reference to bird flu/Is nonsupportive to subject heading. Bird Flu example does little to clarify mechanisms of evolution. Clutter reduction. Next edit →
Line 140: Evolution consists of two basic types of processes: those that introduce new genetic variation into a population, and those that affect the frequencies of existing variation. Paleontologist [[Stephen J. Gould]] once phrased this succinctly as "''variation proposes and selection disposes.''"<ref>{{cite web\|url= http://www.nybooks.com/articles/1151 \|title= Darwinian Fundamentalism \|accessdate=2006-08-01 \|author= Stephen J. Gould \|date=1997-06-12 \|publisher=New York Review of Books}}</ref> These mechanisms of evolution have all been observed in the present and in evidence of their existence in the past. Their study is being used to guide the development of new medicines and other health aids such as the current effort to prevent a [[H5N1]] (''i.e.'' bird flu) pandemic.<ref>The use of evolutionary principles to guide disease diagnosis and drug development with respect to bird flu (''i.e.'' H5N1 virus) is shown [http://www.cdc.gov/ncidod/EID/vol11no10/05-0644.htm here at CDC]. [http://www.nap.edu/books/0309095042/html/123.html#p2000c2099960123001 Here] is the "tree of life" showing the evolution by [[reassortment]] of [[H5N1]] that created the Z genotype in 2002 and [http://www.cdc.gov/ncidod/EID/vol11no10/05-0644-G1.htm here] is evolution by [[antigenic drift]] that created dozens of highly [[pathogenic]] varieties of the Z genotype of avian flu virus [[H5N1]], some of which are increasingly adopted to mammals. Evolution. Right before our eyes.</ref> ====Mutation====

Evolution: Difference between revisions