Photosynthesis primarily occurs in the leaves of a flowering plant. The leaves are the primary site for photosynthesis because they contain chloroplasts, which are specialized organelles that carry out the process of photosynthesis. Other green parts of a flowering plant, such as stems and young fruits, may also contribute to photosynthesis to some extent. However, the majority of photosynthesis takes place in the leaves, where they receive sunlight and have optimal conditions for gas exchange.
