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Standard VIII
Biology
Xylem
Question

Vessels differ from tracheids in presence of
  1. Lignified walls
  2. Protoplasm
  3. Nucleus
  4. Perforations in end walls

A
Lignified walls
B
Nucleus
C
Protoplasm
D
Perforations in end walls
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Solution
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Tracheids Vessels
Derived from a single cell. Derived from a pile of cells.
Present in all vascular plants. Restricted to angiosperms.
These do not have a perforation. These have a perforation at end plates.
These are thin. These are wide.
So the correct option is 'Perforations in end walls'.

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(ii) Dead cells
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(iv) Discontinues lumen due to presence of end walls
(v) Long, cylindrical tube-like structure
(vi) Elongated cells with tapering ends
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