The ____________________ zone is the brightly lit upper zone of the open sea,where drifting phytoplankton carry out about 40% of the world's photosynthetic activity.

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The Answer of The ____________________ zone is the brightly lit upper zone of the open sea,where drifting phytoplankton carry out about 40% of the world's photosynthetic activity.

The ____________________ Zone Is the Brightly Lit Upper Zone of the Open