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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): In an ecosystem, the Net Primary Productivity (NPP) is always less than the Gross Primary Productivity (GPP). Reason (R): Plants utilize a considerable amount of the synthesized organic matter for their own respiration. In the light of the above statements, choose the most appropriate answer from t

Options

  1. ABoth (A) and (R) are true but (R) is not the correct explanation of (A)
  2. B(A) is true but (R) is false
  3. CBoth (A) and (R) are true and (R) is the correct explanation of (A)
  4. D(A) is false but (R) is true

Correct answer

C. Both (A) and (R) are true and (R) is the correct explanation of (A)

Step-by-step solution

Gross primary productivity (GPP) of an ecosystem is the rate of production of organic matter during photosynthesis. A considerable amount of GPP is utilized by plants in respiration (R). Net primary productivity (NPP) is the gross primary productivity minus respiration losses (NPP = GPP - R). Since respiration is always a positive value for living plants, NPP is always less than GPP. Thus, both Assertion (A) and Reason (R) are true, and (R) is the correct explanation of (A). Answer: Both (A) and (R) are true and (R

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