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Transpiration — Biology STD 10 — Question

ICSE BoardEnglish MediumSTD 10BiologyTranspiration1 Mark
MCQ
The rate of transpiration increases with:
  • A
    Increase in humidity
  • ✓
    Increase in wind velocity
  • C
    Reduced light intensity
  • D
    Increase in the $CO _2$ level
✓

Answer

Correct option: B.
Increase in wind velocity
(b) Increase in wind velocity
Explanation :
When the wind velocity increases, it removes the water vapour quickly from the leaf surroundings, reducing the external humidity around the leaf. This enhances the rate of transpiration as water vapour is drawn out of the leaves more rapidly.

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