Carbohydrates  - A large molecule that is synthesised from simple sugars., Chlorophyll - A photosynthetic pigment found in chloroplasts that transfers light energy into chemical energy in molecules., Chloroplast - An organelle found in plants and algae that is the site for photosynthesis., Guard cells - Cells that surround the stomata and change shape depending on the volume of water. They control the rate of transpiration by becoming turgid or flaccid, opening or closing stomata., Lower epidermis - A layer of cells on the leaf’s lower surface that contains stomata and guard cells., Palisade mesophyll - The main photosynthetic tissue in plants located below the upper epidermis. It receives the most light so contains the greatest concentration of chloroplasts., Photosynthesis​ - A reaction that takes place inside photosynthetic organisms (e.g. plants, algae) and manufactures carbohydrates from raw materials using light energy. Overall in the presence of light and chlorophyll:, Spongy mesophyll - A type of loosely packed mesophyll tissue with air pockets, which is specialised for gas exchange. It contains some chloroplasts for photosynthesis., Starch  - A type of carbohydrate made from many glucose molecules joined together. It serves as an energy store in plants, Stomata - Small holes found on the surface of a plant (typically leaves) that can be opened or closed by guard cells to control water loss and gas exchange., Sucrose - A soluble sugar produced from the breakdown of starch in plants. It can be stored, used in respiration or used to synthesise other substances., Upper epidermis - A layer of transparent cells that allows light to strike the palisade mesophyll tissue., Vascular bundle - Part of the transport system in vascular plants that consists of xylem and phloem tissue, Xylem - A transport tissue in plants that is specialised to transport water and dissolved minerals from the roots of the plant to the leaves.,

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