Wood Anatomy: Sapwood and Heartwood · NCERT Biology

Overall, sapwood and heartwood together mainly contribute to:

  1. Photosynthesis
  2. Secondary growth in thickness
  3. Water transport and structural support
  4. Protection of the stem against transpiration and drought stress
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Correct answer: Water transport and structural support

Sapwood ensures conduction of water, while heartwood provides strength and durability. Together, they support the structure and function of woody plants.

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