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NTA Abhyas NEET2020BotanyAnatomy of Flowering PlantsPractice

The chief water-conducting elements of xylem in Sequoia tree are

Options

  1. Avessels
  2. Bfibers
  3. Ctransfusion tissue
  4. Dtracheids

Correct answer

D. tracheids

Step-by-step solution

The chief water-conducting element of xylem in gymnosperms are called tracheids. These are elongated cells with tapering ends and are dead because of the deposition of lignin. These show scalariform, annular, reticulate, or bordered pitted thickening. These are the only water-conducting xylem elements in both gymnosperms and pteridophytes. Generally, vessels are absent in gymnosperms with exceptions like Gnetum, Welwitschia , Ephedra , etc.

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