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)

Academic Biology NCERT Class 10

Correct Answer: (d) (i) and (iii)

Explanation: In an ecosystem, the flow of energy is unidirectional and the flow of materials is cyclic.

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Updated on: 18-Jan-2023

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