$A$ neuron consists of

$(a)$ What is the function of the tissue present in the bark of a tree?
$(b)$ Which substance is present in the adipocyte? How does it help?

Give the characteristics and role of the following:
$(i)$ Cutin
$(ii)$ Suberin
$(iii)$ Sclereids

Name the different components of xylem and draw a living component.

Correlate the first pair of words given below and accordingly write a suitable word in the second pair.
$(i)$ Heart : Cardiac muscles : : . . . . . . : Smooth muscles.
$(ii)$ Tissue repair : Areolar : : Insulation : . . . . . .
$(iii)$ Squamous epithelium : Protection : : . . . . . . : Absorption and secretion.

Select the incorrect sentence.