A-LevelBiologyTransport in plants9700/12 · Oct/Nov 2022 · Q261 Mark

The electron micrograph shows a longitudinal section through part of a plant stem. [Electron micrograph] What is X?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

Axylem vessel element

Bstem cell

Cphloem sieve tube element

Dcompanion cell

✓ Correct answer

D: companion cell

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Topic: Transport in plants, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Oct/Nov 2022 Paper 1 Variant 2, question 26.

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