Question

Explain which part of the leaf was the experiment of the investigation and which part was the control

Answer 1

Answer:

The process of transpiration is demonstrated in the experiment.

(ii)The process in which plants lose water in the form of vapour from its aerial parts is called transpiration.

(iii)The pot was covered with a plastic sheet to prevent escape of the soil water as vapour.

(iv) The control for this experiment can be set up as same without a living plant.

(v) Due to transpiration there is an upward movement of water so roots can absorb more water and thus minerals from soil. The second benefit is that the transpired water forms a cool blanket around the plant thus protecting it from the heat of sun.

(vi)The stomata are sunken into pit. Stomata are covered by hair. The leaf is narrow to reduce the number of stomata.