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KCET2026BiologyOrganisms and Populations

The following graphs represent age pyramids of a population. Identify the correct option representing the status of age pyramids labelled as A, B and C

Options

  1. AA - stable, B - expanding, C - declining
  2. BA - expanding, B - stable, C – declining
  3. CA - stable, B - declining, C – expanding
  4. DA - declining, B - stable, C – expanding

Correct answer

C. A - stable, B - declining, C – expanding

Step-by-step solution

Age pyramids graphically represent the age distribution of a population, typically divided into pre-reproductive (base), reproductive (middle), and post-reproductive (top) age groups. 1. Pyramid A is bell-shaped. The number of individuals in the pre-reproductive and reproductive age groups is almost equal. This indicates that the population size remains constant over time, representing a stable population. 2. Pyramid B is urn-shaped. The base is narrower than the middle, meaning the pre-reproductive age group is sm

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