Question

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

Answer 1

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Parenchyma - Thin cell wall. May be oval spherical or polygonal.
Sclerenchyma- Cell wall is thick due to the presence of a chemical complex substance called lignin.
Collenchyma- Cell walls are thick and elongated with oblique ends.

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Answer 2

parenchyma = parenchyma is composed of large thin walled cells ,usually with intercellular spaces . These are the living cells and are found in the soft parts of the plant..
collenchyma= collenchyma is made up of cells which are elongated and ate thick at the corners or edges .

sclerenchyma= sclerenchyma is composed of long , narrow and thick walled cells. These are dead cells.