The cyanobacteria are common in the marine plankton community

The cyanobacteria are common in the marine plankton community

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The cyanobacteria are common in the marine  plankton  community (huge numbers of tiny aquatic  organisms that float near the surface), and their presence in the early prokaryote world undoubtedly  was a factor in changing the atmosphere from oxygen-free to oxygen-rich, paving the way for arrival  of eukaryote oxygen users.  Purple and green bacteria . These bacteria are anaerobes, some of which use sulfur compounds as  the electron donors (purple sulfur and green sulfur bacteria) and others of which use such organic  compounds as alcohols and fatty acids (purple nonsulfur and green nonsulfur bacteria).  Photosynthetic pigments include carotenoids and several bacteriochlorophylls, but no phycobilins.  The green sulfur bacteria are  photolithoautotrophs  because their energy comes from the sun (photo),  their carbon from CO 2  in the air (auto), their electrons from inorganic sulfur compounds or H
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This note was uploaded on 11/14/2011 for the course BIO 1421 taught by Professor Farr during the Fall '08 term at Texas State.

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