Question

In an ecosystem (i) the flow of energy is unidirectional
(ii) the flow of materials is unidirectional
(iii) the flow of materials is cyclic
(iv) the flow of energy is cyclic.
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iv)
(d) (i) and (iii)

Answer 1

Answer:

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:

Flow of energy is unidirectional because

according to 10% law, 10% of energy is transferred to the succeeding trophic level.

And the energy cannot get reversed or cannot be acquired by the previous trophic level.

hope it helps

Explanation: