9/18/2010 08:33:00 PM by Lauren Axelrod ·
You cannot determine the fittest of the species unless you know the rate of reproduction, and without a rate of reproduction, natural selection cannot determine which of the species is the fittest. Therefore, "Fitness" results from reproduction. You must survive to reproduce, but if you don't reproduce, then no fitness. Rate of reproduction can be determined by, but not limited to, several contributing factors to natural selection including mutations, genetic drift, gene flow, and assortive mating.
Mutations lead to a new genetic variation in population. Mutations can cause varying... From: Natural Selection: Not The Survival of the Fittest
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