Q.
The following diagrams are the age pyramids of different populations.
Select the CORRECT statements regarding the above:
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NTA AbhyasNTA Abhyas 2020Organisms and Populations
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Solution:
A-Age pyramid having higher population of pre-reproductive individuals, moderate number of reproductive individuals and low post-reproductive individual count forms the proper upright triangular shape. It represents growing population or expanding one.
C-If the count of reproductive population is higher than the pre-reproductive population, the age pyramid forms an urn shape. It represents declining or diminishing population with low natality.
B-For a bell-shaped age pyramid, the population of pre-reproductive and reproductive groups is almost equal. Post reproductive population is low. Such age pyramid shows stable or stationary population, neither growing nor diminishing.