Place the five metabolic types in the probable order of their evolution: oxygenic photosynthesis, aerobic metabolisms, anaerobic chemolithoautotrophy, anaerobic chemorganoheterotrophy, anoxygenic photosynthesis. You are expected to justify your answers by identifying the origins of the energy, the carbon used and the redox couples (electron donors and acceptors). Describe the environmental conditions that probably led to the evolution of the next metabolism.

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Photosynthesis

Plants have a capacity that we humans can only imagine— the ability to produce food from sunlight. Sure, we can prepare some dishes that we can savor on, but it become possible because of the plants (as they serve as a producers of all the raw materials required). Photosynthesis is the method of assembling carbohydrates with the aid of sunlight.