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  4. What does the shape of the given age pyramids reflects about the growth status of the related population ? <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/biology/88e1ed8d8c350c7ee77ee6a7797d868d-.jpeg /> (i) (ii) (a) Expanding Stable (b) Stable Declining (c) Expanding Declining (d) Declining Stable

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Q. What does the shape of the given age pyramids reflects about the growth status of the related population ?
image
(i) (ii)
(a) Expanding Stable
(b) Stable Declining
(c) Expanding Declining
(d) Declining Stable

Organisms and Populations

Solution:

Triangular age pyramid has high proportion of prereproductive individuals, moderate number of reproductive individuals and fewer post-reproductive individuals. It represents young or rapidly growing population.
In urn-shaped age pyramid, the number of reproductive individuals is higher than the number of pre-reproductive individuals. It represents declining or diminishing population with negative growth.
In bell-shaped age pyramid, the number of pre-reproductive and reproductive individuals is almost equal. Post reproductive individuals are comparatively fewer. It represents stable or stationary population, neither growing nor diminishing.