Given below are two statements, an Assertion (A) and a Reason (R). Choose the correct answer.
Assertion (A):Ecosystem processes are basically the transfers of energy and materials from one pool to another, which take place at a wide range of scales.
Reason (R):An ecosystem consists of all the organisms and the abiotic pools linked with the physical environment, and the biotic and abiotic components are linked through nutrient cycles and energy flows.
ABoth (A) and (R) are true and (R) is the correct explanation of (A) ✓ Correct
BBoth (A) and (R) are true but (R) is not the correct explanation of (A)
C(A) is true, but (R) is false
D(A) is false, but (R) is true
Correct answer: (A) Both (A) and (R) are true and (R) is the correct explanation of (A)
Explanation
Both the assertion and the reason are true, and the reason explains the assertion.
The assertion describes ecosystem processes as transfers of energy and materials between pools across many scales.
The reason explains that an ecosystem is all its organisms plus the abiotic pools of the physical environment.
Since these biotic and abiotic parts are joined by nutrient cycles and energy flows, transfers between pools naturally follow.
The reason thus lays out the structure that makes the described processes possible.
The one-way flow of energy and the cycling of nutrients are the two master patterns of every ecosystem.
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