An age pyramid represents

An urn shaped population age pyramid represents

An 'Urn' shaped age pyramid represents :-

Bell-shaped age pyramid represents

Assertion : Bell shaped age pyramid represents a stable population. Reason : In a stable population, proportion of individuals in reproductive age group is higher than the individuals in pre-reproductive age group.

A population in which number of pre-reproductive individuals is very large, number of reproductive individuals is moderate while post-reproductive individuals are fewer. Which kind of age pyramid is represented by such a population ?

Assertion: The base of each pyramid represents the top level consumer. Reason: The apex of pyramid represents the producer.

The given pyramid best represents

How many ecological parameters are mainoly used for preparing ecological pyramids ? What does base of pyramid represent ?