Which of the following statements are true? 1. Gross Primary Productivity is always greater than Net Primary Productivity. 2. Gross Primary Productivity plus the respiration losses give us Net Primary Productivity. 3. The rate of respiration of plants affects the Net Primary Productivity. 4. Net Primary Productivity + Gross Primary Productivity = Respiratory loss.

Question

Which of the following statements are true? 1. Gross Primary Productivity is always greater than Net Primary Productivity. 2. Gross Primary Productivity plus the respiration losses give us Net Primary Productivity. 3. The rate of respiration of plants affects the Net Primary Productivity. 4. Net Primary Productivity + Gross Primary Productivity = Respiratory loss. (A) 1 -True ; 2 -False ; 3 -True ; 4 -False (B) 1 -True ; 2 -True ; 3 -False ; 4 -False (C) 1 -False ; 2 -False ; 3 -True ; 4 -False (D) 1 -True ; 2 -True ; 3 -True ; 4 -False

Tardigrade Admin · Accepted Answer

The rate at which the organic matter is produced by photosynthesis is called gross primary productivity. Plants make use of a substantial amount of GPP in respiration. The available biomass for consumption by heterotrophs is called as net primary productivity. So, respiratory losses minus the GPP will give the NPP. GPP - R = NPP . Therefore NPP can never be greater than GPP.

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