BIO120H1 Lecture 9: bio120 - lecture 9
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BIO120H1 Full Course Notes
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Wings can be an impediment for particular birds because for example with birds that dive in water it is better to have loose wings. Adaptive radiation - hawaiian honeycreepers have descended from species of nch in the past 10 million years. Coyne and orr published a book called speciation which was one of the greatest books created in evolutionary biology. 2 main species concept that are taxonomic species and biological species. The concepts vary amongst different groups of organisms. While biological concentrates on inter fertility among individuals. However people look different around the world but are not apart of different species. (downfall to taxonomic) Geneticists felt there needs to be a more rigorous concept. So inter fertility became the main criterion. (a group of interbreeding natural populations that are reproductively isolated from other such groups) - mayr. 2 main modes of speciation - allopatric and sympatric. Allopatric speciation involves a barrier to gene ow.
