Has anoxygenic photosynthesis evolved vertically or has it been transferred laterally? What about the Alphaproteobacteria? Are they ancestrally photosynthetic? I believe all possible scenarios have been proposed in the past for the evolution of anoxygenic photosynthesis in the Proteobacteria. What does most evidence point to nowadays?
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Has anoxygenic photosynthesis evolved vertically or has it been transferred laterally? What about the Alphaproteobacteria? Are they ancestrally photosynthetic? I believe all possible scenarios have been proposed in the past for the evolution of anoxygenic photosynthesis in the Proteobacteria. What does most evidence point to nowadays?
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