title: O phototroph, o chemotroph, where art thou?
authors: B K
authors: BK
authors: Pierson
mesh_terms: D001419:Bacteria / Q000378:metabolism; D018407:Bacterial Physiological Phenomena; D001429:Bacteriochlorophylls / Q000378:metabolism; D005075:Biological Evolution; D019414:Chlorobi / Q000378:metabolism / Q000502:physiology; D005580:Fossils; D010788:Photosynthesis / Q000502:physiology*
chemical_list: D001429:Bacteriochlorophylls