Life processes class 10th science

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Nutrition in plants

Green plants are unique in that they can prepare their own food by using simple inorganic substances carbon dioxide and water. 
The process by which plants prepare their food is known as photosynthesis.

Photosynthesis:

Photosynthesis may be defined as the process by which green parts of the plants prepare their food in the presence of sunlight by obtaining carbon dioxide from air and water from the soil.

Photosynthesis can be represented by equation:
 6CO2 +  12H2O    ➡ C6H12O6  +  6H2O  +  6O2

Photosynthesis is an oxidation-reduction process in which water is oxidised to oxygen and carbon dioxide is reduced to sugars. 
Photosynthesis takes place in two stages:
• light Reaction
• Dark Reaction

Requirements for photosynthesis:

1. Photosynthetic pigments
2. Carbon dioxide
3. Water
4. Sunlight

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