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What did chloroplasts evolve from according to the endosymbiotic hypothesis?
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What did chloroplasts evolve from according to the endosymbiotic hypothesis?

User Kintaro
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According to symbiogenesis or endosymbiotic hypothesis, plastids like chloroplasts evolved from cyanobacteria, specifically the nitrogen-fixing filamentous cyanobacteria. This theory was first proposed by Konstantin Merechowsky in 1910.
User Jeyaram
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