Question 26
Transport in PlantsA major limitation in the use of the potometer for measuring the rate of transpiration is that
- A.it is made of breakable glass material
- B.it measures the rate of water intake
- C.it measures the rate of water loss through the stem only
- D.the movement of the air bubble in the potometer cannot be timed accurately.
Show the answer and explanation
Answer: B (it measures the rate of water intake)
Explanation
A potometer measures how fast the shoot takes up water. Some of that water is used in photosynthesis or kept in the cells, so uptake is only an estimate of transpiration.