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NEET UG BIOLOGY MCQ: ECO SYSTEM

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Analyzing +4 | -1
In an ecosystem if the Net Primary Productivity (NPP) of first trophic level is 100x(kcal m−2)yr−1,100 x\left(\mathrm{kcal} \mathrm{~m}^{-2}\right) \mathrm{yr}^{-1}, what would be the GPP (Gross Primary Productivity) of the third trophic level of the same ecosystem?
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Correct option: B
10x(kcal m−2)yr−110 x\left(\mathrm{kcal} \mathrm{~m}^{-2}\right) \mathrm{yr}^{-1}
Option D (x10 (kcal m−2)yr−1\frac{{x}}{{10}}\,\left(\mathrm{{kcal}} \mathrm{~m}^{-2}\right) \mathrm{{yr}}^{-1}) is correct because energy transfer efficiency is approximately 10%, so the GPP of the third trophic level would be 10% of 10% of the NPP of the first trophic level, resulting in x10\frac{{x}}{{10}}.

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