| (i) An ecosystem is a functional unit of nature and comprises abiotic and biotic components. |
| (ii) Abiotic components are organic materials. |
| (iii) Biotic components are producers, consumers and decomposers. |
| (iv) Energy flow is bidirectional. |
| Which two statements are correct? |
A) (i) and (ii)
B) (ii) and (iv)
C) (iii) and (iv)
D) (i) and (iii)
Correct Answer: D
Solution :
[d] Statements (i) and (iii) are correct. (ii) Abiotic factors are non-living chemical and physical parts of the environment that affect living organisms and the functioning of ecosystems. Abiotic factors can include water, light, radiation, temperature, humidity, atmosphere, and soil, flow of energy and cycling of materials. (iv) Energy flow is unidirectional.
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