Q12 / 180 · NEET 2020 (Phase 1) · Botany

Identify the incorrect statement.

  • A
    Sapwood is involved in conduction of water and minerals from root to leaf
  • Correct answer
    B
    Sapwood is the innermost secondary xylem and is lighter in colour
  • C
    Due to deposition of tannins, resins, oils etc., heart wood is dark in colour
  • D
    Heart wood does not conduct water but gives mechanical support

Solution

Heartwood and Sapwood: In old dicot trees the greater part of the secondary wood in the center of the stem is filled with gums, resins, tannins, tyloses, etc., which makes it hard and non-functional. This region is known as Heartwood or Duramen. The narrower outer region of the secondary wood remains light-colored and is called Sapwood or Alburnum. Sapwood helps in inorganic translocation.

Hence, the correct answer is option: 'B'.

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