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Stomatal Investigation INTRODUCTION Plants carry out transpiration and gaseous exchange through stomata on the leaves. It is therefore likely that the structure and frequency of the stomata is part of the plants adaptation to the environment which they live in. Formulate a testable hypothesis linked to this relationship, and design and carry out an investigation to test your hypothesis. PLAN Transpiration and gaseous exchange is carried out through the stomata on the leaves of plants. Stomata are specialised pores found mainly in the epidermis on the underside of the leaf. They allow the exchange of gases such as, oxygen and carbon dioxide. Water vapour is released through the stomata which is necessary for transpiration. These pores are surrounded by guard cells that contain chloroplasts. Through the changing of size and shape of these guard cells, the size of the stomatal openings are altered so, regulating the gas that is being exchanged. Stomata open and...

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