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9. Respond to the following questions. (5 marks) a. Why might it seem surprising that green light can drive any photosynthesis, given that chlorophyll, the major photosynthetic pigment, is green? Photosynthesis is a process which requires sunlight and chlorophyll for food synthesis. Because green light penetrates the leaf further than red or blue light, any greener light absorbed by the lower chloroplasts would promote leaf photosynthesis more than additional red or blue light in intense white light. b? b. How can it do this? 10. Suppose that CO, levels were to rise to 600 ppm, which in fact probably was their level about 300 million years ago. What effect would you suppose that might have regarding competition between C, and C4 plants? In other words, which of the two kinds of plants would the change favour and why? (5 marks)