O-LevelBiologyTransport in Plants5090/11 · May/June 2015 · Q121 Mark

A plant was placed in water containing black dye. After 24 hours the plant was removed and sections were taken from the root and the stem. [Figure 12.1] Which diagram shows the results?

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ARoot section with central xylem stained; stem section with inner part of vascular bundles stained.

BRoot section with outer cortex/phloem region stained; stem section with inner part of vascular bundles stained.

CRoot section with central xylem stained; stem section with outer part of vascular bundles stained.

DRoot section with outer cortex/phloem region stained; stem section with outer part of vascular bundles stained.

✓ Correct answer

A: Root section with central xylem stained; stem section with inner part of vascular bundles stained.

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Topic: Transport in Plants, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2015 Paper 1 Variant 1, question 12.

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