Which part of a plant is responsible for photosynthesis?

• A. Roots
• B. Stems
• C. Flowers
• D. Leaves

Answer: (D)

Leaves are the part of a plant that is primarily responsible for photosynthesis, which is the process by which plants convert light energy into chemical energy. During photosynthesis, leaves absorb sunlight using a green pigment called chlorophyll, which is found in the chloroplasts of plant cells. The energy from sunlight is used to convert carbon dioxide from the air and water from the soil into glucose (a type of sugar) and oxygen.

The structure of leaves is specifically designed for this process; they have a large surface area to capture sunlight and contain tiny openings called stomata that allow carbon dioxide to enter and oxygen to exit. The veins in leaves also transport water and nutrients necessary for photosynthesis. Overall, the leaves' design and function make them the main site for this vital process, enabling plants to produce their own food and contribute to the oxygen content of the atmosphere.