The most common shape of pyramid of number is

In a pond ecosystem , the shape of a pyramid of number is

In a pond ecosystem , the shape of a pyramid of number is

What is the shape of the pyramid of number in a single tree ecosystem?

Assertion: In forest ecosystem the pyramid of number is somewhat different in shape. Reason: The pyramid of number in forest ecosystem looks spindle shaped.

Assertion (A): In forest ecosystem, the pyramid of number is spindle shaped. Reason (R): Tropical (T1) of the pyramid occupies large trees which are maximum in number

Ecosystem which can have both spindle shaped or inverted pyramid of number is

Ecosystem which can have both spindle shaped or inverted pyramid of number is

Urn shaped pyramid indicates