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    				| 1. | What is net productivity? How is it expressed ? | 
| Answer» ★᭄ꦿ᭄Answer★᭄ꦿ᭄ Net primary productivity (NPP) is GPP minus RESPIRATION loses (R), in the equation, written as NPP = GPP - R. SECONDARY productivity is GIVEN by the rate of formation of new organic matter by the consumers. | |