Name the muscular tissue whose cells are spindle-shaped and uninucleate.

Fill in the blanks:
$(a)$ Cork cells possess ........... on their walls that make them impervious to gases and water.
$(b)$ .................. have tubular cells with perforated walls and are living in nature.
$(c)$ Bone possesses a hard matrix composed of ............... and ............. .

What is the chemical substance that makes the cells of the sclerenchyma hard? Mention where this tissue is likely to be present.

Which is not a function of epidermis?

Name the tissue which is present in the veins of leaves.

Write the functions of parenchyma cells.