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chapter_19_and_20_spr09 - Exam 3 outline 4 Chapter 19...

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Exam 3 outline 4 Chapter 19 Archaeal Diversity Archaeal Traits and Diversity Widest 2°C–121°C Widest range of pH 0, Unique _______________ production No Differences in ___________________ pathways Differences in ___________________________________ 4 Phyla of Archaea- (2 major, 2 minor) Phylum 1: Euryarchaeota 4 groups of Euryarchaeota Thermoplasmatales Phylum Euryarchaeota Extreme halophiles Require at least Common in salt lakes and salterns Give red color to water 1
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Ex. Halobacterium salinarium To prevent water loss in hypertonic environment: pump inorganic make or concentrate an organic Light-mediated energy production: Some extreme halophiles use Don’t have chlorophyll, have Light energy is used to pump protons to outside surface of cell membrane and generate a ATPase uses this gradient to form ATP Methanogens Release Found in Methanogenic habitats Freshwater sediments Gastrointestinal tract of animals Rumen – 10-20% of total methane emitted to atmosphere originates in rumen Landfills Thermoplasmatales Most strains have been isolated from 2
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