Transpiration: Factors and Mechanism · NCERT Biology

High wind speed generally ________ the rate of transpiration initially by ________ the boundary layer.

  1. Decreases; thickening
  2. Increases; removing
  3. Decreases; cooling
  4. Increases; saturating
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Correct answer: Increases; removing

Wind speed removes the saturated air (boundary layer) from the leaf surface. This maintains a steep vapor pressure gradient, which increases the rate of transpiration.

Difficulty: Medium Question 20 of 20

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