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The origin of species 1859 evolution by natural

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Unformatted text preview: And the voyage on the Beagle… the voyage on the Beagle And Alfred Russell Wallace… On the Origin of Species (1859) Evolution by Natural Selection in three parts: 1. The principle of variation There is variation in morphological, physiological, and behavioral traits among members of a species. 4 9/1/2010 Evolution by Natural Selection in three parts: 2. The principle of heredity Th The variation is in part heritable, so individuals resemble their relatives more than they resemble unrelated individuals, and, in particular, offspring resemble their parents. Evolution by Natural Selection in three parts: 3. The principle of differential fitness Different variants leave different numbers Different variants leave different numbers of of offspring either in immediate or in remote generations. The Science of Who’s Related to Who • Phylogenetics – the science of describing the relationships between organisms and the processes behind these relationships • Taxonomy – the science of naming and f...
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