Question

4. Differentiate between parenchyma, collenchyma and
sclerenchyma on the basis of their cell wall​

Answer 1

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Paranchyma -

1) it has a primary cell wall 

2) cell walls are thin 

3) cell wall is made up of cellulose

Collenchyma-

1) it also  has a primary cell wall

2) cell walls are thick at corners 

3) cell wall is made up of cellulose

Sclerenchyma-

1) it has a secondary cell wall  

2) cell wall is very thick reducing the cellular space of the cell

3) cell wall is made up of "lignin" 

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Answer 2

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Parenchyma

• The cell wall composed of cellulose, hemicellulose and pectin.
• It has primary cell wall.
• The cells are thin-walled, less spherical and polyhedral in shape, these are generally isodiametric.

Collenchyma

• The cell wall is composed of cellulose and pectin.
• It has primary cell wall.
• The cells are thickened at the corners , oval , spherical or polygonal ans often contain chloroplast.

Sclerenchyma

• The cell wall is composed of cellulose and lignin.
• It has Secondary cell wall.
• Cells are long or short , narrow , thick-walled and lignified.

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