What is gross primary production?(A) The carbon fixed during photosynthesis.(B)The carbon fixed

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50. What is gross primary production?
(A) The carbon fixed during photosynthesis.
(B)The carbon fixed after cellular respiration is accounted for.
(C)The mass increase of producers.
(D)Photosynthetic production plus energy recycled by detritivores.
(E) Total sun radio energy received by earth

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