Practice Questions

1.Define the term transpiration

Transpiration is defined as the loss of water vapour from the leaves of the plant, through the open stomata

2. State what a potometer measures

A potometer measures the rate of water uptake by a shoot.

3. During the set up of a potometer, the shoot is cut underwater. Explain why

It is cut underwater to prevent air entering the xylem

4. Name 4 conditions which affect the rate of transpiration

Light intensity, temperature, air movment and humidity.