Net primary productivity is a measure of the rate at which ____ accumulate energy, as well as the rate at which new

____ is added to a system.



a. consumers; inorganic material
b. producers; inorganic material
c. carnivores; prey
d. producers; biomass
e. consumers; biomass


ANSWER: d

Biology & Microbiology

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Anemia can result from a deficiency of ____

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