Transport In Plants Question 3
Question: Given below are two statements :
Statement I : The forces generated by transpiration can lift a xylem-sized column of water over 130 meters height.
Statement II: Transpiration cools leaf surfaces sometimes 10 to 15 degrees, by evaporative cooling.
In the light of the above statements, choose the most appropriate answer from the options given below :
(1) Both Statement I and Statement II are correct.
(2) Both Statement I and Statement II are incorrect.
(3) Statement I is correct but Statement II is incorrect.
(4) Statement I is incorrect but Statement II is correct.
Show Answer
Answer: (1) Both Statement I and Statement II are correct.
Explanation-
- Statement I is correct because the forces generated by transpiration, including cohesion and adhesion of water molecules, can indeed lift a column of water in the xylem to great heights, even over 130 meters in tall trees.
- Statement II is also correct because transpiration has a cooling effect on leaf surfaces due to the process of evaporative cooling, which can lower the temperature of the leaf surface by 10 to 15 degrees Celsius.
BETA
