Question

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

stromatolites
stromatolites

fossil record
fossil record

rust deposits
rust deposits

anaerobic organisms

Answer 1

The correct response is **fossil record**. The fossil record provides evidence of an increase in animal species correlating with increases in atmospheric oxygen concentrations, particularly during the Ediacaran and Cambrian periods when multicellular life began to diversify significantly.