Question

Bacteria Temporal range: Archean or earlier – present Had'n Archean Proterozoic Pha.
Scanning electron micrograph of Escherichia coli rods
Scientific classification
Domain:	Bacteria Woese, Kandler & Wheelis, 1990
Phyla
Gram positive / no outer membrane Actinobacteria (high-G+C) Firmicutes (low-G+C) Tenericutes (no wall) Gram negative / outer membrane present Aquificae Bacteroidetes/Fibrobacteres–Chlorobi (FCB group) Deinococcus-Thermus Fusobacteria Gemmatimonadetes Nitrospirae Planctomycetes–Verrucomicrobia/Chlamydiae (PVC group) Proteobacteria Spirochaetes Synergistetes Unknown / ungrouped Acidobacteria Chloroflexi Chrysiogenetes Cyanobacteria Deferribacteres Dictyoglomi Thermodesulfobacteria Thermotogae
Synonyms
Eubacteria Woese & Fox, 1977

Nutritional types in bacterial metabolism

Nutritional type	Source of energy	Source of carbon	Examples
 PhototrophsÂ	Sunlight	 Organic compounds (photoheterotrophs) or carbon fixation (photoautotrophs)	 Cyanobacteria, Green sulfur bacteria, Chloroflexi, or Purple bacteriaÂ
 Lithotrophs	Inorganic compounds	 Organic compounds (lithoheterotrophs) or carbon fixation (lithoautotrophs)	 Thermodesulfobacteria, Hydrogenophilaceae, or NitrospiraeÂ
 Organotrophs	Organic compounds	 Organic compounds (chemoheterotrophs) or carbon fixation (chemoautotrophs) Â	 Bacillus, Clostridium or EnterobacteriaceaeÂ

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Wikipedia