Graph: evolution genomic sequence of bacteria when plotting distance from ancestor on the vertical axis vs. time
Charts: In vivo versus in silico- Two graphs showing evolution of digital organisms diversifying at different rates over time, depending on whether they are "fed" diverse resources.
Background of slide is a photo of petri dishes showing actual bacterial colonies diversifying at different rates over time depending upon media upon which they are grown.
Caption: By running experiments on microbes for thousands of generations,.researchers are exploring the roles of chance and history in evolution
Source: R. Lenski, Michigan State University
The American Association for the Advancement of Science
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