Wood Anatomy: Sapwood and Heartwood · NCERT Biology

Which of the following best explains why heartwood does not conduct water?

  1. Absence of vessels and tracheids
  2. Vessels filled with deposits
  3. Lack of lignin in cell walls
  4. Presence of active cambium layers
Show answer and explanation

Correct answer: Vessels filled with deposits

In heartwood, xylem vessels become blocked by deposits like resins and gums. This prevents further water conduction.

Difficulty: Medium Question 9 of 20

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