Fundamentholfundamenthol
NEET2023Biology
Q.

Given below are two statements:

Statement I: The forces generated transpiration can lift a xylem-sized column of water over meters height.

Statement II: Transpiration cools leaf surfaces sometimes to degrees evaporative cooling.

In the light of the above statements, choose the most appropriate answer from the options given below:

  1. A

    Both Statement I and Statement II are correct

  2. B

    Both Statement I and Statement II are incorrect

  3. C

    Statement I is correct but Statement II is incorrect

  4. D

    Statement I is incorrect but Statement II is correct

Solution

The cohesion-tension theory and direct measurement confirm that transpirational pull can support water columns of m in tall trees — Statement I is correct. Evaporation of water from leaf surfaces removes latent heat and can lower leaf temperature by roughly –C, giving useful evaporative cooling — Statement II is also correct.

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