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    Question

    ______measures the relationship between water loss and

    carbon gain.
    A Transpiration ratio Correct Answer Incorrect Answer
    B Respiration rate Correct Answer Incorrect Answer
    C Water usage efficiency Correct Answer Incorrect Answer
    D Both (A) and (C) Correct Answer Incorrect Answer

    Solution

    The transpiration ratio and water use efficiency both measure aspects of the relationship between water loss and carbon gain.

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