What evidence is there that oxygen levels in the sea increased due to photosynthetic bacteria?(1 point) Responses rust deposits in the ancient ocean rust deposits in the ancient ocean decreases in anaerobic organisms decreases in anaerobic organisms global cooling global cooling rust deposits in today’s ocean
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The evidence that oxygen levels in the sea increased due to photosynthetic bacteria includes rust deposits in the ancient ocean and decreases in anaerobic organisms. These two pieces of evidence suggest that the presence of oxygen increased, as rust formation requires oxygen, and anaerobic organisms thrive in environments with minimal oxygen. Therefore, the increase in rust deposits and decrease in anaerobic organisms support the idea that photosynthetic bacteria contributed to higher oxygen levels in the sea.
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