Question

Give reasons to justify the following -
a) the existence of decomposers is essential in a biosphere
b) Flow of energy in a food chain is unidirectional.

Answer 1

A.Existence of decomposer is essential because they convert the complex substance into simple this ensure that the material taken out from environment is again get into it for further use.
B. Flow of energy is unidirectional becoz the energy that get transfer from plant to herbivores cannot get into plant again
Hope it may help u
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Answer 2

Flow of energy in a food chain is unidirectional. Green plants capture 1 percent of sunlight and convert it into food energy.
I hope these r helpfull