Wood Anatomy: Sapwood and Heartwood · NCERT Biology

Which tissue is directly responsible for converting sapwood into heartwood?

  1. Cork cambium
  2. Vascular cambium
  3. Medullary rays
  4. Secondary phloem
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Correct answer: Medullary rays

Medullary rays help in lateral transport and deposition of substances into older xylem. This contributes to heartwood formation.

Difficulty: Medium Question 11 of 20

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