question_answer 74)

  Differentiate between sclerenchyma and parenchyma tissues. Draw well labelled diagram.

Answer:

  The major difference between sclerenchyma and parenchyma tissues are

Parenchyma	Sclerenchyma
1. Parenchyma tissue consist of living cells.	Sclerenchyma is composed of dead cells.
2. It consist of thin walled cells.	Its cell walls are uniformly thickened.
3. The cell wall is made up of cellulose.	The cell wall is made up or complex polymer lignin.
4. Parenchyma tissue is found in soft parts of  the plans such  as cortex of roots, ground tissues in stems and mesophyll of leaves.	Sclerenchyma tissure is found in roots, veins of levaes and hard covering of seeds and nuts.
5. Parenchyma serves as packing tissue serves as food storage tissue and performs photosynthesis (chlorenchyma).	Sclerenchyma is mechanical and protective in function. It gives strength, rigidity, flexibility and elasticity to the plant body.
Perenchyma tissue (a) Transverse section	Sclerenchyma tissue (a) Transverse section
(b)Longitudinal section	(b) Longitudinal section