Name the three great cultural revolutions that favoured a steep rise in population.

Mention two areas of medical sciences which have indirectly contributed to high growth in human population.

Is the present day human population growth following a J-shaped curve of S-shaped curve?

Write any six factors which have contributed to a rapid rise in human population in recent times in the world.

Give the approximate figures for the population in India in million at

(a) the beginning and

(b) the end of the twentieth century.