L09_2009 Cellular evolution - Cell Evolution Lecture 09...

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Cell Evolution Lecture 09 Cole Gilbert 16 September 2009 Beggiatoa with intracellular sulfur ±²³´µ¶·¸¹³º»´¼½´¾¿À·ÁÂõµ´³²º ķŵºµ´ ¶¸µµÆ³ÇÇÈ È²Áɵȸ² »·ÊÂ·Ë ÅÈÌµÈ Á³¶¶µ¸µ²Íµ !»µ¸µ"#ÄÄ$%%#ÀÎ’(#)¾$(’’à *$)¾ , )- .%’’(/ !»µ²"!$-)$¹-#+ι$01$ÃÀ$(¼2 13 ¼ ½´ ½µ½½³·²"4"550à , ²Á ½µ½½³·²"4"640à 7 ¸Á ½µ½½³·²"2"750à Association for Students of Color presents YOU Wednesday September 16, 2009 4:30-5:30pm RPCC FIRST FLOOR LOUNGE Presented by Mike Chen (msc7) (HE1100, Learning Strategies Center) Steps to SUCCESS at Cornell: -Time Management -Test taking skills -Effective study skills -Stress Management etc. Questions? Please contact Andrew Delapenha (ard37) actin autophagy cis face compartmentalization cytoskeleton double membrane bound endomembrane system Eukarya glycosylation Golgi apparatus living organisms mitochondrion nested evolutionary groups nuclear envelope nuclear pore nucleoid nucleolus nucleus paraphyletic group peptidoglycan pili plastids prokaryote rough scale of life size of cells smooth surface area trans face tubulin vacuole vesicle 1. Diversity of prokaryotes 2. A unifying phylogeny: the Three Domains 3. What everyone needs to know about these microbes (description of some key taxa) 4. Endosymbiotic origin of the eukaryotic cell Where we’re going
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Prokaryotic diversity by the numbers – Estimated 10 30 prokaryotes on Earth (5000 described) – As many as 10 14 microbial cells associated with an adult human body! 10x the number of human cells. Three orders of magnitude more than the number of people who ever lived (100,000,000,000) – Our microbes extend our metabolic capabilities and aid in the development of our immune system – Most microbes are benign, or even useful, but we know the most about those that cause us harm (pathogens - disease causing) Prokaryotes: Limited Morphological Diversity Common shapes: cocci (spherical), bacilli (rod-shaped), spirilla (spiral-shaped) Other shapes: squares, stars, filaments Prokaryotes: metabolically versatile… Aerobic and anaerobic growth Responsible for carbon cycling (fix CO 2 , decompose)
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This note was uploaded on 06/07/2010 for the course BIOG 1101 taught by Professor N/a during the Fall '10 term at Cornell University (Engineering School).

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L09_2009 Cellular evolution - Cell Evolution Lecture 09...

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