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Unformatted text preview: Thus, populations evolve, but individuals do not: a.Individuals inherit unmodified traits. b.Individuals carrying different heritable traits show differential survival and reproduction c.An increasing proportion of individuals carry the favorable trait in the next generation Evolution is the change through time in the proportion of individuals that possess a heritable trait; small-scale changes have extended over vast amounts of time to produce the diversity of life today. Levels of selection: 1.Populations evolve through the spread of traits that benefit the INDIVIDUALS that carry them 2.A trait's effect on the survival of a group or species is secondary to its effects on the individual that possesses it...
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- Fall '08