hy are iron oxides in rocks evidence for prehistoric photosynthesis?(1 point)ResponsesIron oxides form when cyanobacteria use carbon dioxide for photosynthesis.Iron oxides form when cyanobacteria use carbon dioxide for photosynthesis.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 carbon dioxide, a reactant of photosynthesis, is in the atmosphere.

Answer 1

The correct response is: Iron oxides form when cyanobacteria produce oxygen via photosynthesis.

This is because the presence of iron oxides in rocks indicates that oxygen was released into the environment, which is a byproduct of the photosynthetic process carried out by organisms like cyanobacteria. This release of oxygen would have led to the oxidation of iron present in the surroundings, forming iron oxides.