Question

Why the leaves can synthesise food but other parts of the plants cannot?

Answer 1

Hey friend because it contains xylem which is used by plants to synthesis food

Answer 2

It also contains chlorophyll in highest concentrations. Chlorophyll helps absorb sunlight . Sunlight is required for photosynthesis. Leaves contain stomata that open during the day( photosynthesis occurs most at daytime), stomata are openings that allow gases to diffuse in and out of the leaf. So products of photosynthesis like O2 and water vapour can diffuse out and reactants required for photosynthesis like CO2 can diffuse into the stomata. The mesophyll layer is specialised for photosynthesis to occur. I’m the spongy mesophyll layer there are huge airspace’s that allow the gases to diffuse in and out of the cells and the palisade mesophyll layer is arranged in a regular manner to allow most of the photosynthesis to occur here. A waxy cuticle is present above the upper epidermis of the leaf to prevent excess transpiration to occur. The leaf is specialised to perform photosynthesis in many more ways I have just listed a few