Learning objective

Conduct an investigation using a suitable dye to trace the movement of water in the above-ground sections of a plant.

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Cambridge IGCSE BiologyTransport in plantsCore contentPractical objective

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Conduct an investigation using a suitable dye to trace the movement of water in the above-ground sections of a plant

This point belongs to Water uptake, especially Water uptake outcomes.
You need to be able to conduct an investigation using a suitable dye to trace the movement of water in the above-ground sections of a plant.
The key ideas to know are Investigate.
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Investigate

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Paper 6 structured question: Water uptake

Paper 6Alternative to PracticalPractical3 marks

Method

1. A leafy stem was cut under water and placed in a beaker containing coloured dye solution. 2. The plant was left in the dye for 2 hours. 3. After 2 hours, the stem was cut open and examined for the presence of dye. 4. The distance the dye had travelled up the stem was measured.

a
Identify the independent variable in this investigation.
Your answer
Aim for approximately 1 distinct marking point.
[1]
b
Describe how you would improve the accuracy of the measurement of dye movement in this investigation.
Your answer
Aim for approximately 2 distinct marking points.
[2]

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