Solved 2020 Question Paper ICSE Class 10 Biology — Question 7
Back to all questionsThe diagram below represents an experiment to demonstrate a certain phenomenon in a green plant:
(i) Will the level of mercury in the glass tubing rise or fall? Which conducting tissue of the plant does the glass-tubing represent?
(ii) Define Transpiration.
(iii) How will the rate of the above process differ if the environment of the plant has:
- Less humidity
- High temperature?
(iv) State any two advantages of transpiration to the plant.
(v) Draw a neat labelled diagram of a Plasmolysed cell.
(i) The level of mercury in the glass tubing will rise. The glass-tubing represents xylem.
(ii) Transpiration is the loss of water in the form of vapour from the aerial parts of the plant.
(iii)
- Less humidity increases the rate of transpiration.
- High temperature increases the rate of transpiration.
(iv) Two advantages of transpiration to the plants are:
- Cooling effect.
- Creation of suction force for ascent of sap.
(v) Labelled diagram of a plasmolysed cell is given below :
