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Is he progressively increasing the resistance (weight) in each set, as follows:
In their model, Perelson and Macken assume protein evolution occurs as a direct uphill walk on an adaptive landscape -- or, in a biological interpretation, as a series of adaptive point mutations in the DNA codes that translate into a series of progressively fitter proteins.
McNally's observations now suggest a method for intermediate-term predictions: watching for quiescence followed by progressively deeper and larger preshocks.

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