LABORATORY REVIEW
TRANSPIRATION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
It is hard to introduce air bubble
|
|
|
Twigs usually don’t stay alive
|
|
|
Position of bubble does not get influenced by outside temperature
|
|
|
All of the above
|
Detailed explanation-1: -Potometer is an instrument used to measure transpiration by estimating the amount of water taken up by the plants. This apparatus has certain limitations: It does not give an accurate transpiration rate since not all the water taken up, is lost during transpiration.
Detailed explanation-2: -So the correct answer is ‘Water retained by plants is neglected’.
Detailed explanation-3: -Limitations. The potometer does not measure the rate of transpiration accurately because not all of the water that is taken by the plant is used for transpiration (water taken might be used for photosynthesis or by the cells to maintain turgidity). The potometer measures the rate of uptake of water.
Detailed explanation-4: -A potometer is a device used for measuring the rate of water uptake of a leafy shoot, which is almost equal to the water lost through transpiration. The causes of water uptake are photosynthesis and transpiration.