Question

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

anaerobic organisms
anaerobic organisms

rust deposits
rust deposits

fossil record
fossil record

stromatolites

Answer 1

The correct response is **fossil record**. The fossil record provides evidence of the increase in animal species that coincided with the rise in atmospheric oxygen concentrations, particularly during events like the Cambrian Explosion.