Decades: 330s BC 320s BC 310s BC 300s BC 290s BC - 280s BC - 270s BC 260s BC 250s BC 240s BC 230s BC
287 BC 286 BC 285 BC 284 BC 283 BC 282 BC 281 BC 280 BC 279 BC 278 BC 277 BC
... sulfide, sulfur, or hydrogen as an electron donor, and so does not produce oxygen.
The proteobacteria are divided into five major groups, sometimes treated ...
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