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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
Name the process by which water loss takes place through the leaves.
Comment on the following statement:
A well-watered potted plant shows wilting of leaves on a hot sunny day.
Litmus paper is used to demonstrate transpiration from the leaves of the green plant.
A well watered healthy potted plant with variegated leaves was kept in darkness for about 24 hours. It was then set up as shown in the diagram and exposed to light for about 12 hours. At the end of this time, leaf x and y were tested for starch. Study the diagram and answer the questions that follow:
(i) Why was the plant initially kept in darkness for 24 hours?
(ii) What is the function of sodium hydroxide solution in the flask?
(iii) Select the correct leaf from the five available choices shown in the diagram as a, b, c, d and e. Rewrite the correct answer by filling in the appropriate letter for the questions that follow:
1. After the starch test, leaf x would look like ______.
2. After the starch test, leaf y would look like ______.
(iv) The experiment with leaf y shows that photosynthesis requires the presence of certain factors. Mention any one factor.
Choose the correct answer:
More water loss in plants is the cause of wilting. This can be checked by ____________
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.
Boojho’s uncle was hospitalised and put on dialysis after a severe infection in both of his kidneys.
When does it become necessary to take such a treatment?
Excessive transpiration is due to ______.
ABA (Abscisic acid) is called a stress hormone. From where does this hormone get released in leaves?
Plants show temporary and permanent wilting. Differentiate between the two. Do any of them indicate the water status of the soil?
