The correct response is fossil record. The fossil record provides evidence of an increase in animal species corresponding with increased atmospheric oxygen concentrations. As oxygen levels rose, it allowed for more complex life forms to thrive.
Earth's Processes: Weathering and Erosion Unit Test
8 of 158 of 15 Items
Question
What provides evidence of an increase in animal species at the same time that atmospheric oxygen concentrations increased?(1 point)
Responses
rust deposits
rust deposits
stromatolites
stromatolites
anaerobic organisms
anaerobic organisms
fossil record
1 answer