5. Transpiration

Question 1

State the Use of transpiration.

Answer 1

1) creating a suction force in the stem to enable the roots to absorb water and minerals
2) for cooling the plant in hot weather

Question 2

What is the quantity of water lost during transpiration?

Answer 2

98%

Question 3

What is the quantity of water utilised by the plant during absorption of water by roots?

Answer 3

2%

Question 4

Define transpiration.

Answer 4

Transpiration is the process of loss of water in the form of water vapour from the leaves and aerial parts of the plant

Question 5

Name an indicator of moisture.

Answer 5

Cobalt chloride paper

Question 6

Name the reactions when Cobalt chloride paper is dry and moist.

Answer 6

Cobalt chloride paper is blue when dry and pink when exposed to moisture

Question 7

Name the two methods for measurement of transpiration:

Answer 7

1) weighing method
2) potometer method

Question 8

Potometers used for measuring rate of water intake by a plant:

Answer 8

1) Farmer’s potometer
2) Ganong’s potometer

Question 9

Potometer which helps to demonstrate the suction force created due to transpiration:

Answer 9

Darwin’s potometer

Question 10

Potometer used to demonstrate unequal transpiration from the two surfaces of a dorsiventral leaf:

Answer 10

Garreau’s potometer