How is the leaf structure related to the processes of photosynthesis, gas exchange, and transport of materials

Question

i left my book at home and i need help on answers to my LRA...Help!!!

Answer 1

upper surface faces the sun for greater photosynthesis.lower surface contains stomata for gas exchange. veination transports materials throughout the leaf

Answer 2

Tissues of vascular plant leaves: Leaves are cloaked by a single layer of cells called the epidermis. It protects the leaf from physical damage and pathogens. A transparent, waxy, colorless cuticle coats the epidermis. The stomata (small holes) are located on the lower epidermis of the leaf. The stomata allow gases and water vapor into and out of the leaf. Each stoma is controlled by two bean shaped guard cells. The palisade mesophyll is a layer of elongated cells containing chloroplasts found just under the upper epidermis. The majority of photosynthesis takes place within this area. Just below the palisade mesophyll is an area of loosely packed parenchyma called the spongy mesophyll. The spongy mesophyll contains air spaces in which gases circulate. The petiole of the leaf connects the blade with the stem. The vascular tissues pass through with the xylem positioned in the top section of the vein while the phloem occupies the lower section.