Ques. 1AIPMT 2005
Potometer works on the principle of
- osmotic pressure
- amount of water absorbed equals the amount transpired
- root pressure
- potential difference between the tip of the tube and that of the plant.
Answer
(2) amount of water absorbed equals the amount transpired
Solution
A potometer measures the rate of water uptake by a leafy shoot as the movement of an air bubble in a capillary tube.
Almost all the water absorbed by the shoot is lost in transpiration,
The rate of water absorption is taken as equal to the rate of transpiration.
Answer: (2)
Old syllabus