CBSE Class 9 Answered

Parenchyma cells are living whereas sclerenchyma cells are dead.

Parenchyma cells retain their power of division whereas sclerenchyma cells cannot divide.

Parenchyma cell walls are thin whereas the cell walls of sclerenchyma cells are highly lignified and hence thick.

The cells contain cytoplasm whereas the sclerenchyma cells are empty.

Parenchyma tissue acts as a packing tissue, provides support  to plants and also stores food. Sclerenchyma provides strength and protection  to the plants.

Kindly post the remaining doubts as separate queries. We cannot answer such multiple questions