An important factor for plants is the amount of water lost for each molecule of carbon dioxide absorbed. How could the plant be harmed if it loses a lot of water for each carbon dioxide molecule, that is, if the ratio is high? Would this be more important for a plant in a rainy habitat or one in a desert?

Biology Today and Tomorrow without Physiology (MindTap Course List)
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Chapter17: Communities And Ecosystems
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An important factor for plants is the amount of water lost for each molecule of carbon dioxide absorbed. How could the plant be harmed if it loses a lot of water for each carbon dioxide molecule, that is, if the ratio is high? Would this be more important for a plant in a rainy habitat or one in a desert?

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Most of the water in the plant are lost due to a process called transpiration. On exposure to sunlight, the excess water evaporates through small pores which are present on the ventral surface of the leaves called stomata.

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