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प्रश्न
Stomata of a plant open due to ______.
विकल्प
Influx of K+
Effrilx of K+
Influx of Cl–
Influx of OH–
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उत्तर
Stomata of a plant open due to influx of K+.
संबंधित प्रश्न
Discuss the factors responsible for ascent of xylem sap in plants
What are stomata?
Transpiration is defined as:
Define the three processes by which plants absorb water and minerals from the soil.
(a) State whether the following statement are True or False.
(b) Rewrite the false statement in the correct form by changing either the first or the last word only.
Most transpiration occurs at midnight.
Give suitable explanation for the following:
Cork and bark of trees help in preventing loss of water
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?
Litmus paper is used to demonstrate transpiration from the leaves of the green plant.
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?
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.
Given alongside is the diagram of an experimental set-up to demonstrate a certain phenomenon in plants.
What is the purpose of putting oil in the test tube?
Name the cell that surrounds the stoma.
Plants lose water by the process of transpiration.
Boojho’s uncle was hospitalised and put on dialysis after a severe infection in both of his kidneys.
What is dialysis?
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?
Will the ascent of sap be possible without the cohesion and adhesion of the water molecules? Explain.
Why is transpiration less in the still wind?
The process of evaporative loss of water from the aerial parts of a plant is ______.
