2.20 describe the structure of the leaf and explain how it is adapted for photosynthesis

In terms of the basic features leaves have a large surface area; this allows them to absorb more sunlight. They are also thin, meaning that carbon dioxide has a shorter way to travel. In addition the stomata allow the entrance of carbon dioxide.

The more complex adaptations are of the internal leaf structure. The epidermis is thin and its transparent this means that more light can reach the palisade cells underneath the upper epidermis. The palisade cells themselves are er to the top of the leaf so they can absorb more if the light; they contain chloroplasts so that they can absorb the light. The spongy layer has air spaces in: these allow for carbon dioxide to diffuse through the leaf, and they increase the surface area. The wax cuticle is thin and made out of wax so it doesn't stop the sunlight from getting through.