AP BIOLOGY

LABORATORY REVIEW

TRANSPIRATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
An apparatus used to measure the rate of transpiration
A
Garreau’s potometer
B
Darwin’s potometer
C
Ganong’s potometer
Explanation: 

Detailed explanation-1: -A potometer is a device, which is used to measure water uptake by the plant shoot during transpiration. It is also known as transpirometer. Ganong’s potometer is used to measure the transpiration rate in a laboratory.

Detailed explanation-2: -The device consists of a vessel containing water. A cut stem of a plant or a small plant with roots is placed in this vessel. It is sealed with wax or any other material. This vessel is connected to a water reservoir and a graduated capillary tube.

Detailed explanation-3: -Potometer. A potometer can be used to measure the rate of transpiration that’s proportional to water uptake. Transpiration cannot be measured directly as some of the water will be used in photosynthesis.

Detailed explanation-4: -A potometer is a piece of apparatus designed to measure water uptake in a leafy shoot. There are 2 types of potometer – the bubble potometer and the weight potometer.

There is 1 question to complete.