Transpiration

Transpiration is the loss of water as water ______ from the ______ parts of the plant.

Observe the diagram and answer the following;

(i)

(ii)

1. Are these types of guard cells found in monocots or dicots?
2. Which of these shows a higher water content (i) or (ii)?
3. Which element plays an important role in the opening and closing of stomata?

Which one is not related to transpiration?

The figure below represents the set-up at the start of certain experiment to demonstrate an activity of plants:
(i) What is the aim of the experiment?
(ii) Why has oil been put in each test tube?
(iii) What will be the observations in the two test-tubes after about 2-3 days?
(iv) Give reasons to explain any change observed as answered in (iii) above.
(v) Why has the test-tube b without the plant, been taken in the experiment?

Keep some freshly cut flowers in a solution of food colour. Wait for sometime for the dye to rise in the flower, when the stem of the flower is held up in light, coloured strands can be seen inside. Can this experiment demonstrate which tissue is conducting water up the stem?

Identify the wrong statement and correct it.

Leaves perform the function of transpiration only.

Define the three processes by which plants absorb water and minerals from the soil.

What are stomata? What governs the opening and closing of stomata?