Transpiration can taken place from the leaves through A and through the minute pores openings on the surface of old woody stem called B. Name A and B.

The figure given below represents surgical method of contraception. Study the figure and answer the questions that follows.

(a) Name the surgical method of contraception shown in figure.

(b) Define method given in (a).

(c) Identify the label 'A'.

Differentiate between fog and smog.

Name the type of cell division that occurs during:

(a) Growth of shoot

(b) Formation of pollen grain