Question

What is ment by trophic levels in a food chain construct a terrestrial food chain with four trophic levels the energy flows in a food chain is always unidirectional why

Answer 1

Answer:

The energy that is captured by the autotrophs does not revert back to the Sun. Therefore, in the food chain, the energy moves progressively through various trophic levels. This energy is no longer available to the previous trophic level. Thus, the flow of energy in a food chain is unidirectional.