The leaves of plants serve as the primary sites of what process?

• A. Transpiration
• B. Photosynthesis
• C. Nitrogen Fixation
• D. Respiration

Answer: (B)

Verified step by step guidance

1. Identify the main function of leaves in plants. Leaves are primarily involved in the process of photosynthesis, where they convert light energy into chemical energy.
2. Understand the process of photosynthesis. Photosynthesis occurs in the chloroplasts of plant cells, where chlorophyll absorbs sunlight.
3. Recognize the chemical equation for photosynthesis: ${6\mathrm{CO}2}_{+}$. This equation shows how carbon dioxide and water are converted into glucose and oxygen using sunlight.
4. Differentiate photosynthesis from other processes like transpiration, nitrogen fixation, and respiration. Transpiration involves water movement through plants, nitrogen fixation is the conversion of nitrogen gas into a usable form, and respiration is the process of breaking down glucose for energy.
5. Conclude that the primary function of leaves is photosynthesis, as they are equipped with chlorophyll and structures to capture sunlight efficiently.