The upright pyramid of number is absent in

Consider the following statements about ecological pyramids

$I.$ Charles Elton developed the concept of ecological pyramid

$II.$ After the name these pyramids are also called as Eltonian pyramids

$III.$ It is a graphical representation or pyramid shaped diagram which depicts the number of organisms, biomass and energy at each trophic level

Which of the statements given above are correct?

In an ecosystem, there are more prey than predators. This relationship is called

Given below is one of the types of ecological pyramids This type represents

In forest ecosystem, pyramid of number is

Which one of the following statements for the pyramid of energy is incorrect ?