Cell wall of sclerenchymatous fibres and sclereids are respectively thickened by?
Lignin, lignin
The correct option is A.
The explanation for the Correct option:
The explanation for Incorrect options:
Option B:
The cell wall of sclerenchymatous fibres and sclereids both are thickened by lignin, not cellulose.
Option C:
The deposition of lignin causes the thickening of the cell wall of sclerenchymatous fibres and sclereids, not cellulose and hemicellulose.
Option D:
The cell wall of sclerenchymatous fibres and sclereids both are thickened by lignin, not cellulose.
Final answer: Cell wall of sclerenchymatous fibres and sclereids are respectively thickened by lignin.