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11.Organisms and Populations
hard
From the graph of population growth, select the correct option having correct value of ' $r$ 'and bar graph.

A

B

C

D

(AIIMS-2018)
Solution
A bell-shaped polygon indicates a moderate proportion of young to old. As the rate of growth becomes slow and stable, the pre-reproductive and reproductive age group become more or less equal in size and post-reproductive group remains the smallest.
Standard 12
Biology
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