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AQA A Level Biology- Xylem and Phloem Questions & Correct Answers/ Graded A+
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What are xylem? : Tubes that carry water and mineral ions in solution; water travels upwards from roots to leaves. They are formed from dead cells. How is water transported in the xylem? : THE COHESION-TENSION THEORY: 1)Water evaporates from the leaves- transpiration. 2)This creats tension w...
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