In a terrestrial ecosystem, which type of food chain is the major conduit for energy flow?

Identify the correct food chain.

If the biomass of a lion in a food chain is $10 \ kg$,then the biomass of the producers is approximately ...... $kg$.

If $20 \ J$ of energy is trapped at the producer level,then how much energy will be available to the peacock as food in the following food chain (in $J$)?
Plant $\rightarrow$ Mice $\rightarrow$ Snake $\rightarrow$ Peacock

Energy transfer from one trophic level to another in a food chain is: (in $\%$)

Explain energy flow in ecosystem.