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प्रश्न
Write an experiment to demonstrate that CO2 is necessary for photosynthesis.
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उत्तर
Take a destarched plant. Insert one of its leaves in a conical flask, which contains potassium hydroxide. Leave it in the sunlight. After a few hours, test this and any other leaf of this plant for starch. The leaf which was exposed to the atmospheric air becomes blue-black, and the one in the flask containing KOH does not become blue-black after the iodine test. The experiment showing that CO2 is necessary for photosynthesis.
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संबंधित प्रश्न
The diagram below shows two test-tubes A and B. Test-tube A contains a green water plant. Test-tube B contains both a green water plant and a snail. Both testtubes are kept in sunlight. Answer the questions that follow:
(i) Name the physiological process that releases the bubbles of oxygen.
(ii) Explain the physiological process as mentioned above in Q2 (a)(i).
(iii) What is the purpose of keeping a snail in test-tube ‘B’?
(iv) Why does test-tube ‘B’ have more bubbles of oxygen?
(v) Given an example of a water plant that can be used in the above process.
(vi) Write the overall chemical equation for the above process.
Mention the exact location of the following :
Thylakoids
What is meant by photosynthesis? Why is it so important in nature?
The production of starch, and not glucose, is often used as a measure of photosynthesis in leaves because
Complete the following food chain by writing the names of appropriate organisms in the blank:
Grass → __________ → Lion
Give technical term:
In photosynthesis radiant energy is converted into which from?
Complete the following sentence with appropriate word:
A plant that does not perform photosynthesis is _______.
Complete the following sentence with appropriate word:
Xanthophyll is ______ coloured pigment.
______ is ATP factory of the cells.
In leaves, the food is stored in the form of ______.
