The 10% law of energy flow in ecosystem was proposed by

Y-shaped energy flow model in ecosystem was proposed by

The flow of energy in an ecosystem is

Energy and nutrients flow from one trophic level to another in an ecosystem. Which one of the following statements correctly describes the direction of flow of energy and nutrients in an ecosystem?

Which of the following are constituents of an ecosystem?

Which one of the following is not a gaseous biogeochemical cycle in ecosystem?