Biology B3 1.9 Transpiration. 0.0 / 5 ? BiologyExchange of materialsGCSEAQA Created by: Atlanta and JacobCreated on: 23-03-16 19:03 How is water lost from plants? From the leaves by evaporation. 1 of 13 How does the water escape the leaf? Through vapour via the stomata when they open to allow carbon dioxide to enter the leaf. 2 of 13 What purpose can wilting serve? Wilting can protect the leaf from excessive water loss. 3 of 13 What will conditions which increase the rate of evaporation increase? The rate of transpiration. 4 of 13 How do plants take up water? Through the roots. 5 of 13 What happens when water is taken up through the roots? The water passes through the plant to the leaves. 6 of 13 What happens to the water in the leaves? The water evaporates from the leaf cells and the water vapour diffuses out through the stomata. 7 of 13 What is the movement of the water through a plant called? The transpiration stream. 8 of 13 What could happen if the rate of evaporation in the leaves is greater than the water uptake by the roots? The plant could dehydrate? 9 of 13 When is evaporation more rapid? In hot, dry, windy or bright conditions. 10 of 13 What can prevent excessive water loss? The guard cells can close to prevent excessive water loss, wilting can also reduce water loss. 11 of 13 How can wilting reduce water loss? The leaves hang down, which reduces the surface area. 12 of 13 What can be used to show how the uptake of water by a plant changes with different condition? A potometer, this gives a goo idea of the amount of water lost by transpiration. 13 of 13
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