An age pyramid with a broad base indicates a:
Correct answer: D. High percentage of young individuals.
- A. High percentage of old individuals.
- B. Low percentage of young individuals.
- C. Stable population.
- D. High percentage of young individuals.
Explanation
An age pyramid is a graphic representation of an abundance of individuals of different age groups with pre-reproductive individuals at the base, reproductive individuals in the middle and post-reproductive individuals at the top. A triangular age pyramid has a high proportion of pre-reproductive individuals, moderate number of reproductive individuals and fewer post-reproductive individuals. It represents a young or rapidly growing population. In a bell-shaped age pyramid, the number of pre-reproductive and reproductive individuals is almost equal. Post-reproductive individuals are comparatively fewer. It represents a stable or stationary population where growth rate is nearly zero. In an urn-shaped age pyramid, the number of reproductive individuals is higher than the number of pre-reproductive individuals. It represents a declining or diminishing population.
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