Assuming the stomata are open to the same degree, the rate of transpiration should _____ on a rainy day compared with a sunny day because the H₂O concentration gradient from the inside to the outside of the leaf would _____.

Question

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On a rainy day, the humidity in the air is higher than on a sunny day. This means that the concentration gradient from the inside to the outside of the leaf would decrease, since there would be less of a difference in water vapor concentration between the inside and outside of the leaf. As a result, the rate of transpiration would decline.

Assuming the Stomata Are Open to the Same Degree, the Rate