The main source of energy in an ecosystem is .........

Energy flow in an ecosystem is:

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

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 $\%$)?

Energy for the detritus food chain comes from

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