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.

What is photorespiration and how does it affect the Calvin cycle?

What is the significance of stomates in the process of photosynthesis?

How do C4 plants improve the efficiency of the Calvin cycle?

What adaptations do CAM plants have to survive in hot, dry climates?

How do other photosynthetic organisms contribute to the world's oxygen supply?