The sequential process by which plants are able to form carbohydrates is called photosynthesis. • The statement is TRUE. • CARBOHYDRATES are the plant's source of fuel for growth • Green plants make food in the form of carbohydrates Materials Needed for Photosynthesis 1) Chlorophyll - pigment in plants that makes them green - produced naturally by all green plants - its role in photosynthesis is to absorb light 2) sunlight - starts the first reaction in photosynthesis - light-dependent process - as the sunlight excites the chlorophyll, water is split into oxygen and hydrogen, and the oxygen is released into the atmosphere 3) water - The water travels up the stem of the plant from the roots through a complex transport system and arrives in the leaves wc is used as a raw material during photosynthesis 4) carbon dioxide - stomata allows the carbon dioxide gas to enter the leaf’s cells - when photosynthesis had took place, the oxygen from the plant leaves the cells via stomata CARBON DIOXIDE IS BONDED WITH THE HYDROGEN PRODUCED IN THE FIRST LIGHT DEPENDENT PROCESS, TO MAKE CARBOHYDRATES. Photosynthesis Creates Carbohydrates carbon dioxide + water ----> (light energy + chlorophyll) -----> glucose + oxygen • Photosynthesis requires sunlight, carbon dioxide and water to produce glucose. • Carbohydrate - a simple sugar that combines with other sugars to form the plant's structure and stores energy for future use. • Glucose produced from photosynthesis flows to the rest of the plant through phloem, which are small tubes that run throughout the plant. • The plant stores the surplus carbohydrates in the crown and roots, where they will stay until the plant needs them during dark hours or during the winter when the trees lack leaves. Plants use Carbohydrates • Plants use carbohydrates for them to grow. • To use stored carbohydrates, plants take the glucose formed during photosynthesis and combine the carbohydrate from oxygen (process of respiration) -- to release energy • Respiration - occuprs in all living tissues • Photosynthesis only take place in green parts of the plant. (produces chlorophyll) ----------------------------------------------------Leaves That Breathe • The leaves take in carbon dioxide through the stomata on the leaf surfaces • From the stomata, the mesophyll cells use the carbon dioxide to combine it with water and light for photosynthesis. • The waste product is oxygen, which is released through the stomata on the leaves. Water Transport • Water flows through xylem Xylem: are like pipes that bring water to the leaves • The plant relies on transpiration, which is the evaporation of the water through the stomata on the leaves. Sunlight in Photosynthesis • Sunlight - critical part of photosynthesis because it provides the plant with energy. • The energy is used to break the bonds that hold together the hydrogen and oxygen in the water molecules. • The electrons released are sent into a cellular process, called the electron transport chain. • This system forms ATP, which is a type of energy molecule that helps to produce glucose. Questions: 1) What are the four components / materials that are used in photosynthesis? - Water - Carbon dioxide - chlorophyll - sunlight 2) How are carbohydrates made in photosynthesis? Carbon dioxide is bonded with the hydrogen produced in the first light dependent process, to make carbohydrates. 3) To use stored carbohydrates, plants take the glucose formed during photosynthesis and combine the carbohydrate from oxygen. What is this process called? A: Respiration References https://homeguides.sfgate.com/process-plants-use-create-carbohydrates-93983.html http://www.bbc.co.uk/bitesize/standard/biology/world_of_plants/making_food/revision/4/ https://sciencing.com/materials-needed-photosynthesis-7402849.html
