explain the significance of the following:(a)hair like structures on epidermal cells.(b)epidermis has a thick waxy coating of cutin in desert plants.(c)small pores in epidermis of leaf.(d)numerous layers of epidermis in cactus.(e)presence of a chemical suberin in cork cells.

a) The root hair helps to increase surface area for absorption of water and dissolved ions from the soil.
b) In desert plants, thick waxy coating is found so as to protect the plant from the loss of water.
c) The small pores help in exchange of gases and transpiration.
d) Cactus has numerous layers so as to reduce the temperature of the stem and provide support.
e) Suberin helps to make the plant impervious to gases and water.

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