BIL 160 Lecture Notes - Lecture 8: Biogeography, Microevolution, Allele Frequency
16 Mar 2019
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**note: chapter 24 concepts listed online will be on exam; but not covered in lecture. Independent evolution of similar structures in non-related species. Convergent evolution cannot provide info about ancestry. Not homology: comparable structures similar due to common ancestor. Analogous: yes, the wing part independently evolved. Homologous: yes, they do have common ancestor; the forelimb is common. The interesting fossil: looks like a lizard and a bird (feathers, teeth, wings, scales, tail) Ex: fish transition from land to sea land animal from land to sea. Note the common ancestor of all cetaceans. Biogeography: study of geographic distribution of species. Historical + discovery science; evidence for evolution. Pangaea: earth"s continents originally united into 1 continent (pangaea) Continent shapes look like they could fit as a puzzle. Endemic species: only found in one place on earth. Islands have many endemic species, but closely related to species on near mainland/other island. The most well accepted/ as sure as we can be in science.
