Q.Write any three physiological roles of cytokinin

Imagine you are dividing a house that has two families living in it into two separate homes. First you would split up the people and belongings fairly between the two families; only then would you actually build a wall down the middle to make two independent houses. A dividing cell faces the same two-part job — first sort out the nucleus, then split the whole cell body.

These two jobs have their own names, and it is important not to confuse them:

• Karyokinesis is the division of the nucleus. It is the process by which the duplicated chromosomes are separated and shared out to form two daughter nuclei. This is the part that is described in the familiar named stages of division.
• Cytokinesis is the division of the cytoplasm — the splitting of the cell body itself so that each new nucleus ends up inside its own separate cell. …