AP BIOLOGY

Detailed explanation-1: -In chollenchyma the cell walls are unevenly thickened due to deposition of excessive cellulose and pectin.

Detailed explanation-2: -Collenchyma cells are elongated, living cells that occur especially in peripheral positions in leaves and stems of eudicotyledons where they provide mechanical support while they are still growing [1, 2, 3]. At maturity, the cell walls are thick and usually non-lignified, with the thickening often unevenly distributed.

Detailed explanation-3: -collenchyma, in plants, support tissue of living elongated cells with irregular cell walls. Collenchyma cells have thick deposits of cellulose in their cell walls and appear polygonal in cross section. The strength of the tissue results from these thickened cell walls and the longitudinal interlocking of the cells.

Detailed explanation-4: -(I) Uneven thickening of the cell walls is a characteristic of sclerenchyma.

Detailed explanation-5: -Collenchyma is a supporting tissue composed of more or less elongated living cells with unevenly thickened, nonlignified primary walls.