What is the remainder of Gross Primary Production (GPP) called after plants utilize a portion for maintenance (respiratory energy loss)?

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ASecondary Production

BNet Primary Production (NPP)

CTertiary Production

DGross Productivity

Answer:

The amount of organic matter or biomass produced by an individual organism, population, community or ecosystem during a given period of time is called - Productivity
The total amount of solar energy converted (fixed) into chemical energy by green plants is called Gross Primary Production (GPP)
A certain portion of gross primary production is utilised by plants for maintenance (largely respiratory energy loss) and the remainder is called - Net Primary Production (NPP) (which appears as new plant biomass)

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