Define ‘zero population growth rate’

cbse-class-12

#1

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


#2

When the pre-reproductive age group individuals are comparatively fewer and both reproductive and post-reproductive stages are almost in equal stage, i.e. at same level, it is zero population growth rate.
An inverted bell-shaped age pyramid is obtained for zero population growth rate.
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