Question

why the flow of energy in a food chain is unidirectional?
​

Answer 1

Answer:

The flow of energy in an ecosystem is said to be unidirectional because some energy is lost in form of heat when moving from one trophic level to next for the maintenance of homeostasis of an organism thus each successive trophic level receive a less amount of energy as compared to the preceding trophic level.

Answer 2

Explanation:

In a food chain the energy moves progressively through various trophic levels it is no longer available to the previous level and the energy captured by the autotrophs doesn't go back to the solar input.

Hence the flow of energy is unidirectional.