Identify the parts labeled $(a)$,$(b)$,and $(c)$ in the given diagram and state one function for each.

Find out the reason behind the following statements:
$(a)$ Epidermis is thicker in desert plants,though it is usually single-layered.
$(b)$ Presence of a waxy layer (secreted by the epidermis) on the outer surface of plants.
$(c)$ Meristematic cells have a prominent nucleus and dense cytoplasm but lack a vacuole.

If the tip of a sugarcane plant is removed from the field,even then it keeps on growing in length. It is due to the presence of

Note the relationship between the first pair of words and accordingly fill in the blank.
$(a)$ Salivary Gland : Glandular Epithelium : : Respiratory tract : . . . . . .
$(b)$ Flexibility : Collenchyma : : Hardness : . . . . . .
$(c)$ Cutin : Epidermis : : Suberin : . . . . . .
$(d)$ Plasma : Blood : : Axon : . . . . . .

Name the animal tissue which acts as a heat insulator.

Fats are stored in the human body in which of the following tissues?