The ultimate source of energy in the biosphere is

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

The number of trophic levels in the grazing food chain is restricted as the transfer of energy follows . . . . . . %. (in $%$)

The transfer of energy from one trophic level to another occurs according to the second law of thermodynamics. What is the average efficiency of energy transfer from herbivores to carnivores (in $\%$)?

Cybernetics is associated with

Energy enters into the ecosystem through