Transpiration: Factors and Mechanism · NCERT Biology

During transpiration, water is lost from the leaf through:

  1. Lenticels only
  2. Stomatal pores
  3. Hydathodes only
  4. Xylem parenchyma cells
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Correct answer: Stomatal pores

The vast majority (over 90%) of transpiration occurs through the stomatal pores in the leaves. Small amounts are also lost through the cuticle (cuticular transpiration) and lenticels (lenticular transpiration).

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