Which of the following groups of organisms do | vedclass

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(B) Photosynthesis is the process by which green plants,algae,and cyanobacteria convert light energy into chemical energy. In oxygenic photosynthesis,

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Photosynthetic bacteria

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(B) Photosynthesis is the process by which green plants,algae,and cyanobacteria convert light energy into chemical energy. In oxygenic photosynthesis,water $(H_2O)$ acts as an electron donor,resulting in the release of oxygen $(O_2)$ as a byproduct. However,photosynthetic bacteria (such as purple and green sulfur bacteria) perform anoxygenic photosynthesis. These bacteria use substances like hydrogen sulfide $(H_2S)$ or other organic compounds as electron donors instead of water,and therefore,they do not produce $O_2$ during the process. Red algae,$C_4$ plants,and blue-green algae (cyanobacteria) all perform oxygenic photosynthesis.

Which of the following groups of organisms does not produce $O_2$ during photosynthesis?

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