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  4. Population pyramids were first made by

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Q. Population pyramids were first made by

Organisms and Populations

Solution:

A.S. Bodenheimer $(1985)$ was the first ecologist to propose three major age groups in any population. These are pre-reproductive, reproductive and post reproductive. Graphic representation of different age groups found in a population with pre-reproductive groups at the base, reproductive ones in the middle and post-reproductive groups at the top is called age pyramid.