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It is not microevolution if the bacteria are passing the antibiotic resistance between each other through lateral transfer (horizontal gene transfer). This transfer by the way is done using plasimids. Now if the mutation occurs within the bacteria's chromosomal DNA outside the influence of the plasmid then it would be considered a form of divergent evolution. This has been shown to occur in the lab by exposing the bacteria to an enviroment of a perticular type of antibiotic.--[[User:Tims|TimS]] 15:43, 4 May 2007 (EDT)
It is not microevolution if the bacteria are passing the antibiotic resistance between each other through lateral transfer (horizontal gene transfer). This transfer by the way is done using plasimids. Now if the mutation occurs within the bacteria's chromosomal DNA outside the influence of the plasmid then it would be considered a form of divergent evolution. This has been shown to occur in the lab by exposing the bacteria to an enviroment of a perticular type of antibiotic.--[[User:Tims|TimS]] 15:43, 4 May 2007 (EDT)
== This is wrong ==
"Microevolution, narrowly defined, is the theory that natural selection can, over time, increase the overall reproductive fitness of a species."
This is completely incorrect. Microevolution is changes to an organism on the micro level through mutations, nothing more, nothing less. Natural selection allows those changes that are positive for a given environment to win out, but has nothing to do with evolution, which is change. In other words natural selection does not involve creating change, but only works with what is there. Microevolution is the act of change. So basically guys, I'm deleting the statement. If anyone disagrees then please let me know. [[User:Learn together|Learn together]] 17:25, 10 May 2007 (EDT)