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Which organism produces much of the Earths oxygen and is the base of the ocean ecosystem?



A. Green marine algae
B. Phytoplankton
C. Tropical Fish
D. Zooplankton

This question is part of Unit 3 Ocean Environment Pretest
Asked by Povpanthers, Last updated: May 26, 2020

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povpanthers

Povpanthers

Answered May 16, 2019

Phytoplankton
 

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