The greatest biomass of autotrophs in the world’s oceans is that of:

A. Benthic brown algae, coastal red algae and daphnids
B. Benthic diatoms and marine viruses
C. Sea-grasses and slime-molds
D. Free-floating microalgae, cyanobacteria and nanoplanktonCorrect Answer
Correct Option: D. Free-floating microalgae, cyanobacteria and nanoplankton

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