1. Evergreen conifers are some of the oldest trees in the world, and for good reason. They convert carbon dioxide, water, and UV light into glucose through the process of photosynthesis. Photosynthesis is the primary function of leaves. It is the primary function of green leaves. Transpiration is the removal of excess water from the plants into the atmosphere. A. The leaves perform the following functions: Photosynthesis. Since cacti have thick fleshy stems, these took over the job of photosynthesis. As cactus leaves turned into cactus spines and lost their ability to photosynthesize, the plants had to find a new way to produce food. A leaf is often flat, so it absorbs the most light, and thin, so that the sunlight can get to the chloroplasts in the cells. This sending of water into the air also reduces the temperature. The function of leaves: The main feature of leaves is providing food or fruits leaves directly attach with vascular and veins of the plant where they can transfer minerals waters from all parts of the tree and also extract minerals from roots to this way leaves also have its own veins; It is the stalk that connects a leaf to the stem of the plant, it is made of complex conducting tissues called vascular tissues. The Functions of Needle Leaves. The process is called photosyn­thesis by which leaf manufactures food material in the presence of sunlight and green pigment- chlorophyll present in the leaf. We have moved all content for this concept to for better organization. Botanists call the upper side the adaxial surface (or adaxis) and the lower side the abaxial surface (or abaxis). The structures within the leaf convert the energy and make it possible for the plant to get food. Petiole. Also Refer: Photosynthesis. Leaf Structure and Function. Describes the structure and function of leaves. Most leaves have stomata, which open and close.They regulate carbon dioxide, oxygen, and water vapour exchange with the atmosphere. It consists of the upper and lower epidermis, which are present on either side of the leaf. Find out more about the role of leaves in this Bitesize Primary KS2 Science guide. Leaves help absorb sunlight and carbon dioxide (CO2), and a leaf is actually an organ of the plant. Most plants use their leaves to turn water, carbon dioxide, and light energy into the sugars their cells need to function. Parts of a Leaf Diagram. A typical leaf shows three main parts: 1) petiole, 2) leaf base, and 3) leaf blade or lamina, each performing specific functions. Please update your bookmarks accordingly. Also, leaves have large amounts of stomata that expel the water by the process called transpiration. Without sunlight and CO2, plants would be unable to photosynthesize, so there’s a good reason some plants go a bit crazy on leaf production! Leaves help plants survive through photosynthesis. A leaf is an above-ground plant organ and it is green. The functions of modified leaves are not dealt as they carryon spe­cialised functions as discussed earlier. The function of leaves is to help the plant produce food by converting the energy in sunlight into chemical energy that the plant can eat. The epidermis aids in the regulation of gas exchange. Leaf pigments absorb light from the sun and store it in the form of chemical energy. Manufacture of food. The outermost layer of the leaf is the epidermis. Veins form the midrib of the leaf, which gives a leaf structure. Transpiration. Structures within a leaf convert the energy in sunlight into chemical energy that the plant can use as food. Its main functions are photosynthesis and gas exchange. What do plant leaves do? 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