A-LevelBiologyTransport in plants9700/12 · May/June 2015 · Q231 Mark
Which features of these cells make them suitable for their function?
Acirculating contents companion cells; lignified walls xylem vessel elements
Bcellulose walls provide support companion cells; nuclei allow cell division xylem vessel elements
Cnuclei allow cell division companion cells; gaps between cells allow rapid transport xylem vessel elements
Dnumerous mitochondria supply energy companion cells; absence of cytoplasm allows mass flow xylem vessel elements
✓ Correct answer
D: numerous mitochondria supply energy companion cells; absence of cytoplasm allows mass flow xylem vessel elements
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