Which of the following cells is found in the cartilaginous tissue of the body?

State whether the following statement is true or false:
Sclerenchyma is a tissue that makes the plant soft and flexible.

Note the relationship between the first pair of words and accordingly fill in the blank.
$(a)$ Salivary Gland : Glandular Epithelium : : Respiratory tract : . . . . . .
$(b)$ Flexibility : Collenchyma : : Hardness : . . . . . .
$(c)$ Cutin : Epidermis : : Suberin : . . . . . .
$(d)$ Plasma : Blood : : Axon : . . . . . .

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.

Animals of colder regions and fishes of cold water have a thicker layer of subcutaneous fat. Describe why?

$(a)$ 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?