| Front | Describe the mass flow hypothesis for the mechanism of translocation in plants. [4 marks] |
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| Back | 1. In source/leaf sugars actively transported into phloem; 2. By companion cells; 3. Lowers water potential of sieve cell/tube and water enters by osmosis; 4. Increase in pressure causes mass movement (towards sink/root); 5. Sugars used/converted in root for respiration for storage; |
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