11 - Endosymbiosis and Eukaryotic Diversity Todays GAE C...

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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)Today – Review session in 1250 BPS @ 3-4:30. 4)Next week’s GAE – computer simulations of the process of diffusion. Each group of 3 – designate 1 laptop for downloading software. Bring fully charged computer to class on next Fri. 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. An example from Wednesday’s lecture? Cellular mechanism – Evolutionary advantage -. Prokaryotes – lateral gene transfer Eukaryotes – endosymbiosis (with internal LGT) Freeman Fig. 29.11 Protist unity: Mitochondrion Origin Primary Endosymbiosis - an α -proteobacterium was engulfed by a eukaryote Evidence: 1. Morphological similarity of α -protobacterium and mitochondrion. 2. Similar information processing – e.g., 70S ribosomes. 3. Mitochondrial genomes are
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11 - Endosymbiosis and Eukaryotic Diversity Todays GAE C...

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