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प्रश्न
Define the following term:
Transpiration
Define transpiration.
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उत्तर
Loss of water vapour through the stomatal openings of the leaves of a plant is termed as transpiration.
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संबंधित प्रश्न
Water reaches great heights in the trees because of suction pull caused by ______.
Transpiration is defined as:
Under what conditions do plant transpire most slowly?
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
Fill in the blank:
Water is lost from the leaves by__________.
Define the term Transpiration stream
How does transpiration help in the uptake of water from the soil?
Give suitable explanation for the following:
Cork and bark of trees help in preventing loss of water
Give a reason.
What happens to the movement of the air-bubble if the apparatus shown above is kept in dark.
Comment on the following statement:
A well-watered potted plant shows wilting of leaves on a hot sunny day.
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?
Choose the correct answer:
The percentage of cuticular transpiration in plants is _____________
Given alongside is the diagram of an experimental set-up to demonstrate a certain phenomenon in plants.
What is the purpose of the spring balance in the set-up?
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:
Why was the pot covered with a plastic sheet?
Describe an experiment to prove that transpiration occurs more from the undersurface of dorsiventral leaves.
Give Technical Term
When cobalt chloride paper is placed on lower and upper surface of the leaf, the paper of which side becomes more pink?
What type of transpiration is possible in the xerophyte Opuntia?
Guard cells are responsible for the opening and closing of stomata.
Identify the wrong statement and correct it.
Leaves perform the function of transpiration only.
Do different species of plants growing in the same area show the same rate of transpiration at a particular time? Justify your answer.
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?
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?
Observe the following diagram and identify the process and its significance from the following options:
Name the structures through which Transpiration occur in a plant.
