Answer:
(i)
Functions of Lignin
(a) It is a chemical substance, which acts as cement and provides strength
to the plant.
(b) It's presence make the walls of sclerenchyma
thick. (1)
(ii) Functions of Cutin
(a) It is a chemical substance with waterproof quality.
(b) It is present as a thick waxy cutin on epidermis, in
desert plants.
(c) It prevents excessive loss of water through
transpiration. (1)
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