Question

The flow of energy is unidirectional in an ecosystem. Why? [Biology]
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Answer 1

Thus, the flow of energy in the ecosystem is said to be unidirectional because the energy lost as heat from the living organisms of a food chain cannot be reused by plants in photosynthesis. ... During the transfer of energy through successive trophic levels in an ecosystem, there is a loss of energy all along the path.

Answer 2

Answer:

Most the energy that plants get from sun is lost as heat. This heat is not sent back to the sun again. Similarly, during transmission of energy, only 10 percent is energy is passed. And the remaining is lost and not sent back. Therefore direction of energy flow is one way.

Explanation: