Mature sclerenchyma cells have

cellulose wall and are living

lignified wall and are living

suberized wall and are dead

lignified wall and are dead

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This question was previously asked in

UPSC CDS-2 – 2020

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Mature sclerenchyma cells are characterized by having thick, lignified secondary cell walls and being dead at functional maturity.

Sclerenchyma provides mechanical support to the plant. The lignified walls make them rigid and strong. The two main types of sclerenchyma cells are fibres and sclereids.

Parenchyma and collenchyma cells are living at maturity and typically have cellulose walls. Collenchyma walls may be thickened but usually lack lignin. Suberized walls are found in cork cells (phellem).

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