Describe adaptations of a leaf for photosynthesis and transpiration.

You're on a roll — Step 1: Describe adaptations of a leaf for photosynthesis (11.1). 11.1 Photosynthesis: Leaves have a large, flat surface area* to maximize the absorption of sunlight. They are thin* to allow for short diffusion distances for carbon dioxide to reach the photosynthetic cells and for oxygen to exit. The palisade mesophyll layer* contains numerous chloroplasts, which are packed with chlorophyll to absorb light energy. Stomata* on the leaf surface allow for the intake of carbon dioxide and release of oxygen. A network of veins* (xylem) supplies water to the photosynthetic cells. Step 2: Describe adaptations of a leaf for transpiration (11.2). 11.2 Transpiration: Stomata*, primarily on the lower epidermis, allow for the diffusion of water vapor out of the leaf. The spongy mesophyll layer* has large air spaces, creating a large internal surface area for water to evaporate from the cell surfaces into the air spaces. A network of xylem vessels* in the veins transports water from the roots to the leaves, replacing the water lost through transpiration. The cuticle* on the leaf surface is a waxy layer that reduces uncontrolled water loss from the epidermis. Drop the next question.