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प्रश्न
Explain the process of production of food in plants.
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उत्तर
Leaves are the food factories of plants. They are the sites where the synthesis of food occurs in plants. The leaves of plants contain a green pigment called chlorophyll. This pigment captures the sun’s energy, which is used to prepare food from carbon dioxide and water. The process of synthesis of food using sunlight, carbon dioxide, and water is known as photosynthesis. During the process of photosynthesis, the leaves containing chlorophyll convert carbon dioxide and water into carbohydrates in the presence of sunlight. Carbohydrates, which are produced during photosynthesis, are ultimately converted into starch to be stored in plants. This process can be represented in the form of the following equation:
\[\ce{6CO2 + 6H2O ->[Chlorophyll][sunlight] \underset{(Glucose)}{C6H12O6} + 6O2}\]
संबंधित प्रश्न
Show with the help of a sketch that the plants are the ultimate source of food.
Name two inorganic substances which are used by autotrophs to make food.
Apart from sunlight and chlorophyll, what other things are required to make food by photosynthesis?
(a) Name the pigment in leaves which absorbs sunlight energy.
(b) What is the colour of this pigment?
Why do plants need nitrogen? How do plants obtain nitrogen?
The cells which surround a stomatal pore.
How do guard cells regulate opening and closing of stomatel pores?
What will happen to the rate of photosynthesis on a plant under the following circumstances?
(i) cloudy day in morning but bright sunshine in the afternoon
(ii) no rainfall in the area for a considerable time.
(iii) gathering of dust on the leaves
The opening and closing of the stomatal pores depends upon:
(a) oxygen
(b) water in guard cells
(c) temperature
(d) concentration of CO2 in stomata
What are the by-products of autotrophic nutrition?
