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Which organisms are thought to be responsible for the appearance in the geological record of banded...

Which organisms are thought to be responsible for the appearance in the geological record of banded iron formations?

A) Iron oxidizing bacteria

B) Iron reducing bacteria

C) Cells with mitochondria

D) Cyanobacteria

E) Algae with iron-sulfur clusters

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Answer #1

The conventional hypothesis is that the banded iron layers are formed in sea water by oxygen released by photosynthetic cyanobacteria.

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