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Jon is researching the oxygenation of Earth’s atmosphere. Which unicellular organism do biologists consider to be the main contributor to that process? A. paramecia B. amoebae C. dinoflagellate D. cyanobacteria
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Jon is researching the oxygenation of Earth’s atmosphere. Which unicellular organism do biologists consider to be the main contributor to that process?

A. paramecia
B. amoebae
C. dinoflagellate
D. cyanobacteria

Answer is D. cyanobacteria

User Josileudo Rodrigues
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6 votes

Answer:

D. cyanobacteria

Step-by-step explanation:

User Mina Abadir
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6 votes
Answer is D.... Cyanobacteria
User Vsevolod Poletaev
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