Some shared metabolic capabilities such as anoxygenic photosynthesis or nitrogen fixation are a result of convergent evolution.

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Convergent evolution refers to when organisms evolve similar traits or characteristics independently of each other, often as a result of similar selective pressures. Some shared metabolic capabilities, such as the ability to perform anoxygenic photosynthesis or to fix nitrogen, have evolved independently in different groups of bacteria through convergent evolution.

Some Shared Metabolic Capabilities Such as Anoxygenic Photosynthesis or Nitrogen