Which event is geologically the oldest?
A) evolution of vascular plants
B) evolution of modern humans
C) oxygen accumulation in the Earth's atmosphere
D) evolution of prokaryotes
E) evolution of reptiles

Question

Quizplus · Accepted Answer

Evolution of prokaryotes, which occurred around 3.5 billion years ago, is the oldest of the given events. The evolution of reptiles occurred around 320 million years ago, the evolution of vascular plants occurred around 410 million years ago, the oxygen accumulation in the Earth's atmosphere occurred around 2.4 billion years ago, and the evolution of modern humans occurred around 200,000 years ago, all of which are much younger than the evolution of prokaryotes.

Which Event Is Geologically the Oldest