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4 August, 23:49

Which of the following describes the importance of cyanobacteria to early Earth atmosphere formation?

A.) Cyanobacteria released oxygen into the air, creating a protective ozone layer

B.) Cyanobacteria relased nitrogen into the air, creating a protective ozone layer

C.) Cyanobacteria absorbed excess oxygen from the air, creating proper amounts of atmospheric oxygen

D.) Cyanobacteria absorbed excess carbon dioxide from the air, creating a protective ozone layer

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Answers (1)
  1. 5 August, 03:26
    0
    I do believe it is a
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