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Biology · May / June 2019 · Paper 11 · Question 12

5090Uptake and transport of water and ions

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. Which diagram shows the results?

  1. Aroot: central dark diamond shape; stem: ring of dark vascular bundles
  2. Broot: dark central region; stem: ring of dark vascular bundles
  3. Croot: central dark diamond shape; stem: solid dark central region
  4. Droot: dark central region; stem: entire stem dark

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Correct answer: A. root: central dark diamond shape; stem: ring of dark vascular bundles

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