Synthesis of Food in Green Plants
Green plants synthesize their own food through a process called photosynthesis. This process involves the conversion of light energy into chemical energy, which is stored in the form of glucose.

Key Steps in Photosynthesis:
- Light Absorption: Chlorophyll, a green pigment present in the chloroplasts of plant cells, absorbs light energy from the sun.
- Water Absorption: Plants absorb water from the soil through their roots, which is transported to the leaves for photosynthesis.
- Carbon Dioxide Intake: Carbon dioxide is taken in from the atmosphere through small openings called stomata on the leaves.
- Energy Conversion: Light energy is used to convert carbon dioxide and water into glucose and oxygen.
- Glucose Production: Glucose, a simple sugar, is produced during the process of photosynthesis and serves as the primary source of energy for the plant.

Factors Affecting Photosynthesis:
- Light Intensity: Higher light intensity leads to increased photosynthetic activity.
- Temperature: Optimal temperatures ensure efficient photosynthesis.
- Carbon Dioxide Levels: Sufficient carbon dioxide is essential for the process to occur.
- Water Availability: Plants require water for photosynthesis to take place.

Importance of Photosynthesis:
Photosynthesis is crucial for the survival of green plants as it provides them with the energy they need to grow and carry out essential functions. Additionally, photosynthesis is responsible for producing oxygen, which is vital for all living organisms on Earth.