BIO 200 Lecture Notes - Lecture 4: Tiktaalik, Tuff, Archaeopteryx
9 Jun 2015
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Bio200 evolutionary biology: darwin didn"t create the origin of life, darwin big accomplishment was explaining the major force in creating new species from already existing species this is the idea of transmutation in species in common decent. His theory centered a specific mechanism of evolution rather than where life came from. Darwin has three critical pieces: there must be variation in the population, variation must lead to differences among individuals in lifetime reproductive success, variation must be transmitted to the next generation. (heritable) If we have these three, natural selection occurs : however, for ecologists who study natural selection in the present use these five criteria: easy and testable questions. 1: populations tend to overbreed relative to available resources, leading to a. Individuals vary struggle access to these limited resources: better variations must have better survival, survivors will reproduce more than non-survivors wont, traits leading to better survival and reproduction must be heritable. (transmitted through generations).
