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Our early atmosphere was anoxic- without free oxygen; how did this change? A primitive organisms carrying out chemosynthesis B primitive organisms carrying out photosynthesis C primitive organisms carrying
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Our early atmosphere was anoxic- without free oxygen; how did this change?

A primitive organisms carrying out chemosynthesis


B primitive organisms carrying out photosynthesis


C primitive organisms carrying out cellular respiration

OR A AND B

User Drrobotnik
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1 Answer

3 votes

Answer:

B

Step-by-step explanation:

Our early atmosphere was anoxic and primitve organisms carried out photsynethess.

User Lalit
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