(i) Most transpiration occurs at midnight.
(ii) Transpiration creates a pull for the upward movement of the sap.
(iii) Wind velocity has an effect on transpiration.
(iv) Voltmeter is an instrument used for measuring the rate of transpiration in green plants.
Answers:
(i) (a) False (b) Most transpiration occurs at mid-day.
(ii) (a) True
(iii) (a) True
(iv) (a) False (b) Potometer is an instrument used for measuring the rate of transpiration in green plants.