Question

Which step caused an aerobic atmosphere during the history of Earth?

A. origin of cell membranes
B. an energetic atmosphere
C. origin of anaerobic prokaryotes
D. origin of photosynthetic prokaryotes

Answer 1

The correct answer to the question is D.

Origin of photosynthetic prokaryotes caused an aerobic atmosphere during the history of Earth.These prokaryotic organisms are the first organisms to be found in our planet earth.
I hope it helped.

Answer 2

Out of the choices given, the step that caused an aerobic atmosphere during the history of Earth was the origin of photosynthetic prokaryotes. The correct answer will be D.