AIIMS2019ZoologyOrganisms and Populations
Select the correct option w.r.t. age pyramids.
Options
- AA-Expanding, B-Stable, C-Declining
- BA-Stable, B-Expanding, C-Declining
- CA-Stable, B-Declining, C-Expanding
- DA-Declining, B-Stable, C-Expanding
Correct answer
A. A-Expanding, B-Stable, C-Declining
Step-by-step solution
In a growing or expanding population, the number of pre-reproductive individuals is very large, number of reproductive individuals is moderate while post reproductive individuals are fewer. In a stable population, the number of pre-reproductive and reproductive individuals is almost equal whereas post reproductive individuals are fewer. In declining population, proportion of reproductive age group is higher than pre-reproductive age group. Number of post reproductive individual is also sizeable.