[metacognative]

We've been here before. Please...a single example of a positive mutation

[js1138]

http://64.233.179.104/search?q=cache:AXWEr-j7t9YJ:www.zoology.ubc.ca/~otto/Reprints/Orr1994.pdf+favorable+mutations&hl=en

[MeanWestTexan]

"Please...a single example of a positive mutation"

Here are two:

http://mednews.stanford.edu/releases/1998/novreleases/mutation.html

http://www.fda.gov/fdac/features/795_antibio.html