what was the effect of the great oxidation ev...
what was the effect of the great oxidation event on non - \na. it led to the formation of red bands in rocks after available iron compounds had reacted with oxygen\nb. it changed the chemical makeup of earths atmosphere\nc. it led to the formation of gray bands in rocks when interacted with iron.\nd. it caused populations to fluctuate because it changed the environmental conditions
Answer
# Brief Explanations:
The Great Oxidation Event was a significant event in Earth's history. Oxygen reacted with iron - rich compounds in rocks, forming red - colored iron oxides (rust), creating red bands in rocks. It also drastically changed Earth's atmosphere from a reducing to an oxidizing one. Option C is incorrect as it led to red bands, not gray bands. While it did change environmental conditions, there is no strong evidence in the question context that it directly caused population fluctuations as described in D.
# Answer:
A. It led to the formation of red bands in rocks after available iron compounds had reacted with oxygen; B. It changed the chemical makeup of Earth's atmosphere