Give reasons for the following:
Tissue $A$: Cells are filled with fat globules and the tissue acts as an insulator.
Tissue $B$: Has cylindrical,branched cells and the tissue shows rhythmic contraction and relaxation throughout life.

Differentiate between chlorenchyma and aerenchyma.

Parenchyma cells are

Fill in the blanks:
$(a)$ ............. are forms of complex tissue.
$(b)$ .............. have guard cells.
$(c)$ Cells of cork contain a chemical called .............
$(d)$ Husk of coconut is made of ............. tissue.
$(e)$ ............ gives flexibility in plants.
$(f)$ ............... and ............... are both conducting tissues.
$(g)$ Xylem transports ............... and ............... from soil.
$(h)$ Phloem transports ............... from ............... to other parts of the plant.

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

$(i)$ What is epidermis?
$(ii)$ List three functions of epidermis.