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100 year life span - PowerPoint PPT Presentation

Two interesting stories...

Two interesting stories. The story of the peppered moth:. 1850: mostly speckled; a few dark. 1900: mostly dark; a few speckled. 2000: mostly speckled; a few dark. The story of the bacteria:. 2nd round of same antibiotic: some die. 3rd round of same antibiotic:

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100 year life span - PowerPoint PPT Presentation

Two interesting stories...