Ch17 - Microbial Evolution and Systematics Chapter 17...

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10/12/2011 1 Microbial Evolution and Systematics Chapter 17 Figure 17-1 Stromatolites: an ancient life-form.
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10/12/2011 2 Modern Stromatolites Ancient Stromatolites: A book of information A 3.4 Billion Year Old Stromatolite
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10/12/2011 3 Figure 17-2 Objecting to microbial ancestry. Microbial Fossils – Light Microscopy
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10/12/2011 4 Microbial Fossils – SEM Origins of Life 1. All the essential elements needed. Particularly C,N,H,O,S, P, + minerals (Na, K, Mg, Ca + trace minerals). 2. A constant source of energy. 3. Temperatures below 150 o C so that organic molecules can exist.
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10/12/2011 5 Crab Nebula, a Remnant Supernova Life Exists in a Narrow Surface
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10/12/2011 6 Microbes, mostly bacteria and archaea have been present for all of the earth’s biological history starting about 3.8 billion years ago. Earth’s History Shows Shows appearance of oxygen.
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10/12/2011 7 Microfossils Along Side Present Day Microbes
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10/12/2011 8 Geological Items Can be Miss-identified as Fossils Chemical Signatures of Life
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10/12/2011 9 Early Metabolism Early Metabolism Could Also Include Proton Pumping
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10/12/2011 10 Iron Ore Mine in Western Australia Banded Iron Formations Chert (quartz) with Fe 2 O 3 (red) alternates with reduced iron (black)
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10/12/2011 11 Iron Prototrophy Another Primitive Metabolism
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10/12/2011 12 Microbial Evolution of Metabolism Chemical Origin
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10/12/2011 13 Models for Origin of Life Model for Origin of Protein Enzymes
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10/12/2011 14 A viral (Hepatitis C) mRNA with a Catalytic Site These ribozymes may have theraputic value Jennifer Doudna Small-subunit ribosomal RNA (SSU rRNA) of Escherichia coli.
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10/12/2011 15 E. coli 16S RNA Figure 17-16 The molecular clock.
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16 Figure 17-18 DNA sequence alignment. Sequences
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This note was uploaded on 12/28/2011 for the course MCB 3020 taught by Professor Staff during the Fall '08 term at FIU.

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Ch17 - Microbial Evolution and Systematics Chapter 17...

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