Advertisements
Advertisements
Questions
Define the following term:
Transpiration
Define transpiration.
Advertisements
Solution
Loss of water vapour through the stomatal openings of the leaves of a plant is termed as transpiration.
APPEARS IN
RELATED QUESTIONS
Under what conditions do plant transpire more quickly?
The set up shown alongside was kept in sunlight for an hour. It was observed that drops of water appeared on the inside of the polyethylene bag.

- Name the process which is being demonstrated.
- Why was the pot and its soil left uncovered by the polythene bag?
- Why was the pot left in the sunlight?
- Suppose the pot in this experiment was placed inside a dark room instead of placing it in sunlight for some time. What difference will be noticed?
State whether the following statement is true or false. Rewrite the false statement correctly.
Transpiration cools the plant when it is hot outside.
Multiple choice question. Tick (✓) the correct choice:
The loss of water through the stomata of leaves is called
(a) transpiration
(b) wilting
(c) evaporation
(d) osmosis
Why is there a need for a transport system in plants and animals?
Transpiration is the loss of water as water ______ from the ______ parts of the plant.
Given below is a diagrammatic sketch (surface view) of a stomatal apparatus from a dicot leaf.
(a) Label the parts numbers 1-3
(b) Is this state, open or closed?
(c) Is this stoma, of a dicot leaf or a monocot leaf?
(d) Redraw a sketch of the stomatal apparatus in the state opposite to the one shown here.
The diagram given alongside is an apparatus used to study a particular phenomenon in plants.
(i) Name the apparatus.
(ii) What is it used for?
(iii) What is the role played by the air bubble in this experiment?
(iv) Of what use is the reservoir?

Give a reason.
What happens to the movement of the air-bubble if the apparatus shown above is kept in sunlight.
Give a reason.
What happens to the movement of the air-bubble if the apparatus shown above is kept in dark.
An apparatus as shown below was set up to investigate a physiological process in plants. The setup was kept in sunlight for two hours. Droplets of water were then seen inside the bell jar. Answer the questions that follow:

Suggest a suitable control for this experiment.
What are stomata? What governs the opening and closing of stomata?
Design an experiment to demonstrate the transpiration process.
Name the cell that surrounds the stoma.
During transpiration, there is a loss of ______
Guard cells are responsible for the opening and closing of stomata.
Transpiration is a necessary evil in plants. Explain.
Boojho wanted to test the presence of starch in leaves. He performed the following steps.
- He took a leaf and boiled it in water.
- He placed the leaf in a petri dish and poured some iodine over it.
He did not get the expected result. Which step did he miss? Explain.
Transpiration takes place through ______.
Why is transpiration called a necessary evil?
Write a note on Transpiration.
Will the ascent of sap be possible without the cohesion and adhesion of the water molecules? Explain.
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?
ABA (Abscisic acid) is called a stress hormone. From where does this hormone get released in leaves?
Observe the diagram and answer the following;
![]() (i) |
![]() (ii) |
- Are these types of guard cells found in monocots or dicots?
- Which of these shows a higher water content (i) or (ii)?
- Which element plays an important role in the opening and closing of stomata?
Name the structures through which Transpiration occur in a plant.
The process of evaporative loss of water from the aerial parts of a plant is ______.


