Photosynthesis: Variations in Photosynthesis

The video discusses the process of photorespiration, which affects the Calvin cycle by fixing oxygen instead of carbon dioxide, leading to carbon loss. This is exacerbated in warm climates due to stomatal closure. C4 plants, like corn and sugarcane, have developed a mechanism to efficiently fix CO2, despite higher ATP costs. CAM plants, such as cacti, adapt by storing CO2 at night. Additionally, photosynthesis is not limited to plants; many protists and bacteria also contribute significantly to the world's oxygen supply.

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