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NTA Abhyas NEET2020BotanyAnatomy of Flowering PlantsPractice

The elongated or tube-like cells, with thick, lignified walls and tapering ends are

Options

  1. ATracheids
  2. BVessels
  3. CXylem fibre
  4. DXylem parenchyma

Correct answer

A. Tracheids

Step-by-step solution

Xylem is made up of four different kinds of elements in which tracheids are oldest, elongated with thick-walled structures. Tracheids are the main xylem elements in a gymnosperm. 4 types of xylem elements are - 1 . Tracheids: Elongated cells with tapering ends. Dead cells (no protoplasm) with lignified cell walls. 2 . Vessels (Tracheae): Vessel is tubular structure made up of cells (vessel members) joined together end to end. Dead cells (no protoplasm) with lignified cell walls and a large central cavity. Members a

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