In desert plants,the rate of water loss is reduced due to the presence of:

Which of the following does not lose their nucleus at maturity?

Fats are stored in the human body in which of the following?

Identify the parts labeled $(a)$,$(b)$,and $(c)$ in the given diagram and state one function for each.

Give one reason for the following statements:
$(a)$ Blood is called a connective tissue.
$(b)$ Muscles are able to contract and relax to bring about movements.
$(c)$ Muscles of the heart are called involuntary muscles.

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.