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  1. In an ecosystem the rate of production of organic matter during photosynthesis is termed as:
    1. Gross primary productivity
    2. Secondary productivity
    3. Net productivity
    4. Net primary productivity
Correct Option: A

Gross Primary Productivity (GPP) is the rate of production of biomass or accumulation of energy by green plants per unit area per unit time. GPP depends on the chlorophyll content.



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