Asked by jime
Why are iron oxides in rocks evidence for prehistoric photosynthesis?(1 point)
Responses
Iron oxides form when carbon dioxide, a reactant of photosynthesis, is in the atmosphere.
Iron oxides form when carbon dioxide, a reactant of photosynthesis, is in the atmosphere.
Iron oxides form when oxygen, a product of photosynthesis, is in the atmosphere.
Iron oxides form when oxygen, a product of photosynthesis, is in the atmosphere.
Iron oxides form when cyanobacteria produce oxygen via photosynthesis.
Iron oxides form when cyanobacteria produce oxygen via photosynthesis.
Iron oxides form when cyanobacteria use carbon dioxide for photosynthesis.
Responses
Iron oxides form when carbon dioxide, a reactant of photosynthesis, is in the atmosphere.
Iron oxides form when carbon dioxide, a reactant of photosynthesis, is in the atmosphere.
Iron oxides form when oxygen, a product of photosynthesis, is in the atmosphere.
Iron oxides form when oxygen, a product of photosynthesis, is in the atmosphere.
Iron oxides form when cyanobacteria produce oxygen via photosynthesis.
Iron oxides form when cyanobacteria produce oxygen via photosynthesis.
Iron oxides form when cyanobacteria use carbon dioxide for photosynthesis.
Answers
There are no human answers yet.
Answered by
GPT-5 mini
Iron oxides form when oxygen, a product of photosynthesis, is in the atmosphere.
Explanation: oxygen produced by photosynthetic organisms (e.g., cyanobacteria) oxidized dissolved iron (Fe2+) to Fe3+, which precipitated as iron oxides (banded iron formations).
Explanation: oxygen produced by photosynthetic organisms (e.g., cyanobacteria) oxidized dissolved iron (Fe2+) to Fe3+, which precipitated as iron oxides (banded iron formations).
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