Name the animal tissue which acts as a heat insulator.

Name the element$(s)$ of xylem which
$(i)$ help in transport of water and minerals,
(ii) stores food,and
(iii) provides mechanical support.

Draw a labelled diagram of unstriated (smooth) muscle tissue and mention its occurrence,features,and functions.

Name a connective tissue which has a hard matrix.

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.

Choose the wrong statement.