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प्रश्न
Long answer question.
In order to carry out photosynthesis, what are the substances that a plant must take in? Also mention their sources.
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उत्तर
For preparing food, the plants require the following :
- Water (from the soil)
- Carbon dioxide (from the air)
- Chlorophyll (contained in the leaf)
- Energy (from sunlight)
The process of preparing or synthesizing food using water from the soil and carbon dioxide from the air, together chlorophyll and sunlight is called photosynthesis. This entire process is a series of complex chemical reactions Photosynthesis is represented as follows:
\[\ce{carbon dioxide + water ->[chlorophyll][sunlight]glucose +oxygen}\]
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संबंधित प्रश्न
Short answer question.
Which four of the following are needed for photosynthesis in a leaf:
(i) Carbon dioxide:
(ii) Oxygen:
(iii) Nitrates :
(iv) Water:
(v) Chlorophyll:
(vi) Soil:
(vii) Light:
State whether the following statement is True or False:
The chlorophyll enables the plants to use light energy.
State whether the following statement is True or False:
The free oxygen in the atmospheric air is the result of photosynthesis.
State whether the following statement is True or False:
Photosynthesis occurs only in chlorophyll-containing parts of the plant.
Long answer question.
Do plants need oxygen? If so, what is its source?
Tick the most appropriate answer.
Plants have these for the exchange of gases.
Attempt any TWO of the following:
Describe ‘any two’ factors affecting the rate of photosynthesis.
Photosynthetic organisms occur at different depths in the ocean. Do they receive qualitatively and quantitatively the same light? How do they adapt to carry out photosynthesis under these conditions?
In tropical rain forests, the canopy is thick and plants growing below receive filtered light. How are they able to carry out photosynthesis?
Why does the rate of photosynthesis decrease at higher temperatures?
