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A Levels Biology (9700)•9700/14/M/J/25
Question 27 from 9700/14/M/J/25

Explanation

Xylem Transports Water/Minerals; Phloem Transports Sugars/Amino Acids

Steps:

  • Xylem conducts water and dissolved minerals upward from roots.
  • Phloem transports sucrose, amino acids, and water (as sap solvent) bidirectionally.
  • Plant K invades xylem, accessing water and minerals.
  • Plant L invades phloem, accessing water, amino acids, and sucrose.

Why B is correct:

  • Matches xylem's role in mineral transport and phloem's role in organic solute (sucrose, amino acids) transport per plant vascular tissue definitions.

Why the others are wrong:

  • A: Omits minerals from xylem and amino acids from phloem.
  • C: Excludes minerals from xylem; phloem lacks significant minerals.
  • D: Omits amino acids from phloem.

Final answer: B

Topic: Structure of transport tissues

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