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Anatomy of Flowering Plants — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYAnatomy of Flowering Plants2 Marks
Question
Differentiate between collenchyma and sclerenchyma.
✓

Answer

 
Collenchyma
Sclerenchyma
1
The cells are alive at maturity.
The cells are dead at maturity.
2
Cell wall is unevenly thickened, with pectin; thickenings are prominent in the corners.
Cell wall is uniformly - thickened with lignin; sometimes lumen is obliterated.
3
It gives strength and flexibility to growing organs.
It gives mechanical support to the organ and the fibres are used for making ropes/threads.
4
It may possess chloroplasts and carry out photosynthesis.
It never possesses chloroplasts.

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