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प्रश्न
Answer the following question.
Explain why photosynthesis is considered the most important process in the biosphere.
उत्तर
Photosynthesis is considered to be the most important process in the biosphere due to the following reasons:
- Photosynthesis is the biochemical process through which all plants (primary producers) produce food.
- It is responsible for the release of oxygen into the atmosphere.
- Heterotrophs are directly or indirectly dependent on autotrophs for energy and other related resources.
Therefore, photosynthesis is considered the most important process in the biosphere.
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संबंधित प्रश्न
The following diagram demonstrates a physiological process taking place in green plants. The whole set up was placed in bright sunlight for several hours. Study the diagram and answer the questions that follow
(i) What aspect of the physiological process is being examined?
(ii) Explain the physiological process mentioned in (i) above.
(iii) Label the parts numbered 1 and 2 in the diagram.
(iv) Write a well-balanced chemical equation for the physiological process explained in (ii) above.
(v) What would happen to the rate of bubbling of the gas if a pinch of sodium bicarbonate is added to the water in the beaker? Explain your answer.
The process of conversion of ADP into ATP during photosynthesis.
The following statement is about photosynthesis in a green plant. Write whether it is True or False.
Photosynthesis results in a gain in dry weight.
Match the terms of column I with those in column II:
| Column I | Column II |
| (i) Stomata closed | (a) decomposers |
| (ii) Autotrophs | (b) light reaction |
| (iii) By-products of photosynthesis | (c) animals |
| (iv) Photolysis | (d) during night |
| (v) Bacteria and fungi | (e) green plants |
| ( f) oxygen |
A candidate studied the importance of certain factors in photosynthesis. He took a potted plant and kept in the dark for over 24 hours. In the early hours of the next morning, he covered one of the leaves with black paper in the centre only. Then he placed the plant in sunlight for a few hours and tested the leaf which was covered with black paper for starch.
Why was the plant kept in the dark before the experiment?
What are the basic requirements of photosynthesis?
What is meant by the photolysis of water?
Complete the following food chain by writing the names of appropriate organisms in the blank:
Grass → __________ → Lion
The green pigment present in the plant is ______.
