Wood Anatomy: Sapwood and Heartwood · NCERT Biology

Heartwood differs from sapwood mainly because heartwood:

  1. Conducts water and minerals efficiently
  2. Contains living, metabolically active xylem cells
  3. Is darker and non-functional in conduction
  4. Is produced continuously by the vascular cambium
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Correct answer: Is darker and non-functional in conduction

Heartwood consists of dead xylem elements that no longer conduct water. It appears darker due to deposition of substances like tannins and resins.

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