During photosynthesis, the gross primary productivity is the rate of production of
A
Organic matter
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B
Oxygen
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C
Carbon dioxide
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D
Chlorophyll
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Solution
The correct option is A Organic matter
The productivity of an ecosystem refers to the rate of production or the amount of organic matter accumulated per unit area in unit time.
Gross Primary Productivity (GPP) is referred as the total rate of photosynthesis including the organic matter used up in respiration during the measurement period.
Hence, GPP is the rate of production of organic matter.