The dead element present in the phloem is

In desert plants, the rate of water loss is reduced due to the presence of:

Why is parenchyma called a permanent tissue? Name the two special types of parenchyma. Mention their specific roles in plants.

State whether the following statement is true or false:
An individual nerve cell may be up to a metre long.

Name the different components of xylem and draw a living component.

Give reasons for the following:
$(i)$ Bark of a tree is impervious to gases and water.
$(ii)$ In desert plants,epidermis has a thick waxy coating.
$(iii)$ Epidermal cells of the roots generally have hair-like parts.