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Biology 1002B
Tom Haffie

Biology 1002B Lecture 1 January 8, 2013 Light: Energy and Information Chlamydomonas: sexually active, light-harvesting, carbon-reducing hydrogen- belching planimal. Green algae. Organelles in Chlamydomonas: Nucleus  Just one, similar to animal cells Basal body  at the base of flagellum, where microtubules develop to produce flagellum Endoplasmic Reticulum  Ribosomes  Golgi  Mitochondrion  Chloroplast  One single chloroplast Pyrenoid  here carbon fixation takes place, in chloroplasts. Eyespot  rich in carotenoid pigment, found in chloroplast, nothing to do with photosynthesis, enables cell to orientate itself towards light needed for photosynthesis. Carbon Fixation: Reduction of inorganic carbon to organic compounds by living organisms. Extremophiles. Evolution of Complexity: - entwined, twisted together - more than one entity that comes together - ex: protein complex where several proteins come together - more complex, more things coming together Chlamy is much larger (more complex) than E.Coli. Why? - Genome size? - PCG (Protein coding genes) What determines complexity? Evolution of Multicellularity: - Same species with different levels of multicellularity - Volvox: very multic
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