NEET UG 2011 — Ecosystem

Which one of the following statements is correct for secondary succession?

Which one of the following statements for pyramid of energy is incorrect, whereas the remaining three are correct?

Of the total incident solar radiation the proportion of PAR is

What type of human population is represented by the following age pyramid? 

Mass of living matter at a trophic level in an area at any time is called

Eutrophication is often seen in

The breakdown of detritus into smaller particles by earthworm is a process called