BIOL 2400 Lecture Notes - Lecture 3: William Whewell, Carl Linnaeus, John Playfair

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James hutton (1726-1797) argues observations of geology should be explicable by processes we can observe in present time, and develops concept of uniformitarianism: supported by other geologists of the time: Inheritance of characteristics acquired during life due to differences in environment: progression of forms from simple to complex, simple forms are continuously generated spontaneously from non-living matter. On the origin of species 1959: 2 major ideas, common descent: all living and extinct species descended from one or a few common ancestors; macroevolution. Biol*2400 dr. crease winter 2017: adaptation occurs by natural selection: characteristics of organisms change through time as a result of natural selection; microevolution. Natural selection: consider species of parthenogenetic beetles that come in 2 colours: red and blue, start with population of 10 beetles in each colour (1:1 ratio, differential survival, differential reproduction: Architects of modern synthesis: william castle (1867-1962, 1903 claimed that allele frequencies would remain constant if natural.

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