What provides evidence of an increase in animal species at the same time that atmospheric oxygen concentrations increased?(1 point)

Question

Responses

rust deposits
rust deposits

stromatolites
stromatolites

fossil record
fossil record

anaerobic organisms
anaerobic organisms

Answer 1

The correct answer is "fossil record." The fossil record provides evidence of an increase in animal species at the same time that atmospheric oxygen concentrations increased. Fossils show the presence of different animal species that lived during specific time periods, and the increase in animal fossils coincides with the increase in atmospheric oxygen levels during the Proterozoic and Paleozoic eras.