3.3 Phloem
Exam question
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What does phloem transport?
(1)Total for this question: 1 mark
3(h) TRANSPORT · EXAM QUESTIONS
3.3 Phloem
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3.3 Phloem
Exam question
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In which direction does phloem transport sucrose?
(1)Total for this question: 1 mark
3.3 Phloem
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Explain why sucrose is transported to the roots of a carrot plant in autumn.
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Total for this question: 2 marks
3.3 Phloem
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Explain why sucrose rather than glucose is transported in the phloem.
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Total for this question: 2 marks
3.3 Phloem
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Describe the movement of sucrose in a potato plant in early summer.
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Total for this question: 2 marks
3.3 Phloem
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Illustrative context: aphids on rose bushes.
Aphids feed by pushing a mouthpart into the phloem of a stem. Explain why aphids reduce the growth of a plant.
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Total for this question: 3 marks
3.3 Phloem
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State the name of the process of moving sucrose in the phloem.
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Total for this question: 1 mark
3.3 Phloem
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A ring of bark, including the phloem, is removed from a tree trunk. After some weeks the bark just above the ring swells. Explain why.
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Total for this question: 2 marks
3.3 Phloem
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Predict what would happen to the roots of the ringed tree over several months. Explain your answer.
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Total for this question: 2 marks
3.3 Phloem
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Compare the substances carried in the xylem and the phloem.
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Total for this question: 2 marks
3.3 Phloem
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Which plant part is a sink for sucrose?
(1)Total for this question: 1 mark
3.3 Phloem
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Explain why amino acids must be transported to the shoot tip.
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Total for this question: 2 marks
3.3 Phloem
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Illustrative experiment description.
Radioactive carbon dioxide was supplied to one leaf of a plant. After an hour radioactivity was found in the roots and in the shoot tip. Suggest what this shows.
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Total for this question: 2 marks