The chemical present in the walls of bark of the tree which makes them impervious to gases and water is

Name the animal tissue which acts as a heat insulator.

Write true $(T)$ or false $(F)$ for the following statements:
$(a)$ Epithelial tissue is a protective tissue in the animal body.
$(b)$ The lining of blood vessels,lung alveoli,and kidney tubules are all made up of epithelial tissue.
$(c)$ Epithelial cells have a lot of intercellular spaces.
$(d)$ The epithelial layer is a permeable layer.
$(e)$ The epithelial layer does not allow the regulation of materials between the body and the external environment.

Identify the following tissues:
$(a)$ The epithelial tissue which has pillar-like tall cells.
$(b)$ The cells of this tissue are filled with fat globules.
$(c)$ The movement of this tissue pushes the mucus forward to clear the respiratory tract.
$(d)$ It gives buoyancy to the lotus to help it float.
$(e)$ This tissue is present in lung alveoli.

Draw and identify different elements of phloem.

State whether the following statement is true or false:
Cuboidal epithelium forms the lining of the oesophagus and the lining of the mouth.