Question

Define ‘zero population growth rate’. Draw an age pyramid for the same.

Answer 1

Introduction to zero population growth rate:

Zero Population growth rate is a condition wherein the population neither grows, nor declines. It is because the number of pre-reproductive, reproductive and post-reproductive individuals are almost equal. Hence, the population size remains stable, neither growing nor declining.

Age pyramid for zero population growth rate:

The age pyramid for zero population growth rate is inverted bell-shaped.


Fig. Age pyramid of zero population growth rate