Answer:
1) Palisade cells are present in the leaves of the plant below epidermis and cuticle. These cells contain chloroplast where photosynthesis occurs.
2) Guard Cells are present in the epidermis of leaves, stem and branches of plants. They are responsible for opening and closing of small hole called stomata which helps in the exchange of gases.
3) Veins are present in the leaves which is responsible for the transportation of water and food within the leaves.
4) Waxy Cuticle is present on the surface of leaves. Its main function is to reduce the transpiration in plants.