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The plants that grow in hot and dry conditions are called xerophytic plants. Water conservation is key to their survival. So, they have innovated a new protocol of photosynthesis called CAM pathway, i.e., Crassulacean acid metabolism. In this pathway, such plants keep their stomata open in night to take up CO2 while their stomata remain closed during the day in order to avoid transpiration. In the daytime, they synthesize glucose from CO2.

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10y ago

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