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STD 11 - 13. Plant growth and development — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 13. Plant growth and development1 Mark
MCQ
During differentiation of tracheary elements
  • A
    The cells lose its protoplasm
  • B
    Cells develop very strong elastic lignocellulosic secondary cell walls
  • ✓
    Both $(a)$ and $(b)$
  • D
    The cell increases its protoplasm
✓

Answer

Correct option: C.
Both $(a)$ and $(b)$
c
During differentiation, cells undergoes few to major structural changes both in their cell wall and protoplasm. For example, to form tracheary elements, the cells would loose their protoplasm. They also develop a very strong, elastic, lignocellulosic secondary cell walls to carry water to long distances even under extreme tension

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