Cork cells are made impervious to water and gases by the presence of

While doing work and running,you move your organs like hands,legs etc. Which among the following is correct?

Determine the location of the following tissues:
$1$. Unstriated muscle fibres
$2$. Cuboidal epithelium
$3$. Adipose tissue
$4$. Striated muscle fibres

$(a)$ Give reasons for the following:
$(i)$ Multicellular organisms are considered more efficient.
$(ii)$ Sclerenchyma cells have a narrow lumen.
$(iii)$ Epidermis is thicker in desert plants though it is usually single layered.
$(b)$ Name the following:
$(i)$ Tissue that occurs in specific regions of growth.
$(ii)$ Tissue present at the growing tips of stems and roots.
$(iii)$ Tissue at the base of the leaves or internodes on twigs.
$(iv)$ Basic packing tissue in the form of a few layers of cells.

State one important function of each of the following:
$(a)$ Areolar tissue
$(b)$ Cuboidal epithelium

Name the muscular tissue which is present in the iris of the eye. What is the shape of these cells?