Photosynthesis — Mains Questions

Discuss the ecological significance of photosynthesis, highlighting its role in carbon sequestration and climate change mitigation. What are the challenges in enhancing photosynthetic efficiency for sustainable agriculture?

Compare and contrast the C3, C4, and CAM photosynthetic pathways. How do these adaptations reflect evolutionary responses to environmental pressures, and what are their implications for agricultural practices in different climatic zones?

Elucidate the mechanism of light-dependent reactions in photosynthesis. How do these reactions contribute to the overall energy conversion process, and what is their significance in the context of atmospheric oxygen production?