How is the process of carbon fixation in CAM plants different from the process in C3 and C4 plants?

CAM plants open their stomata at night, when temperatures are cooler, and take in carbon dioxide for fixation. They keep their stomata mostly closed during the day, reducing water loss through transpiration. Thus, choice c is correct; CAM plants are especially adapted to dry conditions, not moist, low-light areas as choice b claims.

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