Nerve cell does not contain

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

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.

Parenchyma cells are

Name the liquid matrix of the blood. What does it contain? List any two functions of blood.

Which of the following helps in the repair of tissue and fills up the space inside the organ?