12. Endosymbiosis

12. Endosymbiosis - Endosymbiosis and Eukaryotic Diversity...

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Endosymbiosis and Eukaryotic Diversity – Today’s GAE 1)The role of models in BSCI 207 – to assemble, visualize, and apply fundamental concepts 2)Today’s GAE – construct physical models of the process of endosymbiosis 3)Next Friday’s GAE – computer simulations of the process of diffusion. Group of 3 – designate 1 laptop for downloading software. Group of 4-5 two laptops, if possible. Bring fully charged computer to class on Friday. Endosymbiosis and Eukaryotic Diversity – Today’s GAE 1)The role of models in BSCI 207 – to assemble, visualize, and apply fundamental concepts 2)GAE - Active-engagement exercise on critical processes in the primary and secondary endosymbiosis of plastids 3)Homework of the significance of endosymbiosis in the evolution of eukaryotes – available on the website later today. Endosymbiosis and Eukaryotic Diversity Eukaryotes evolved as complex assemblages of several organisms Endosymbiosis – the uptake of another organism and its evolution into an organelle. Eukaryotes acquired aerobic respiration and oxygenic photosynthesis from bacterial endosymbionts. Prokaryotes – lateral gene transfer Eukaryotes – endosymbiosis (with LGT) Unifying features include: nucleus, sexual life cycle, endomembrane system, and complex cytoskeleton. Eukaryotes originated the sexual stages, i.e., syngamy and meiosis, in life cycles. Eukaryotes manifest more organellar, cellular, and multicellular diversity than prokaryotes. Protists - paraphyletic group including all eukaryotes except plants, fungi, and animals Eukaryote History What process did the earliest organisms use for their energy? energy process?
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This note was uploaded on 02/01/2012 for the course BSCI 207 taught by Professor Higgins during the Spring '08 term at Maryland.

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12. Endosymbiosis - Endosymbiosis and Eukaryotic Diversity...

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