Case Study Introduction
Dr. Richard Lenski, a researcher at Michigan State University, has shown, in real time, evolution in cultures of the
widely known bacterium, Escherichia coli. This required immense patience over decades to see if different
phenotypes would emerge from separate, but initially identical cultures of E. coli. After about 33,000
generations, one of the cultures gained an advantage: it could also use another molecule in addition to glucose,
citrate, to fuel its activities under conditions where it previously could not. Dr. Lenskis prediction was supported
by a change in E. coli metabolism and showed that evolution could take place in an unchanging environment.
Please see attached assignment in thee parts.
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