BIOL 1202 Lecture 1: BIOL 1202 Notes (Feb 6)

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16 Feb 2017
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Chemoautotrophs use ___ as an energy source and ___ as a carbon source. Inorganic compounds; co2: prokaryotic metabolism can vary with respect to oxygen availability. Facultative anaerobes: can survive with or without oxygen. Fermentation when no o2 is present: obligate anaerobes: are poisoned by oxygen. Anaerobic respiration: substances other than o2 act as electron acceptors (e. g. , no3. Nitrogen metabolism: some prokaryotes can metabolize nitrogen. In nitrogen fixation, bacteria convert n2 (nitrogen gas) to nh3 (ammonia) Metabolic cooperation: cooperation between prokaryotes allows them to use resources they could not use individually, the cyanobacterium anabaenea. Figure 27. 14 metabolic cooperation in a colonial prokaryote. Concept 27. 4: molecular systematics is illuminating prokaryotic phylogeny. A tentative phylogeny of some of the major taxa of prokaryotes based on molecular systematics: figure 27. 16 a simplified phylogeny of prokaryotes. Prokaryotic domains: comparison of traits found in the domains bacteria and archaea, table 27. 2 a comparison of the three domains of life.

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