Question

give characteristic features of collenchyma cell with diagram over it

Answer 1

cell wall materials are deposited at the corners of cells

thickening non-uniform type localised
thickened by deposition of cellulose, hemicellulose and pectin

vacuole Central in position

Protoplasm peripheral in position
intercellular spaces are absent

Answer 2

1. These cells are isodiametric and elongated. 2. Cell walls are unevenly thickened at the corners due to the deposition of cellulose, hemicellulose and pectin. 3. These often contain chloroplasts.  4. Intercellular spaces are absent.  5. It provides mechanical support to the growing parts of the plant.