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Standard XII
Biology
Definition of Biomass
Question

Which of the following is expected to have the highest value (gm/m2/yr) in a grassland ecosystem?
  1. Gross production (GP)
  2. Secondary production
  3. Net production (NP)
  4. Tertiary production

A
Secondary production
B
Tertiary production
C
Gross production (GP)
D
Net production (NP)
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Solution
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Gross productivity is the amount of energy trapped in organic matter during a specified interval in produces. Net productivity is the amount of energy trapped in organic matter during a specified interval at a given trophic level, that is less than gross productivity due to the energy lost by the respiration of the organisms at that level
So, the correct answer is 'Gross production (GP)'

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