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Tissues — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceTissues1 Mark
MCQ
Which of the following does not lose their nucleus at maturity?
  • A
    Companion cells.
  • B
    Red blood cells.
  • C
    Vessel.
  • D
    Sieve tube cells.
✓

Answer

  1. Companion cells.

Explanation:

Companion cells are present along the sieve tube are connected to them via plasmodesmata. These cells are metabolically active and sieve tube elements are dependent on these cells they do not lose nucleus at maturity. RBC vessels and sieve tube cells lose their nucleus at maturity.

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