The oldest proposed cell microfossils are from ____ year-old rocks.
A) 3.5 billion
B) 1.25 billion
C) 1.8 billion
D) 1.5 billion
E) 500 million

Question

The oldest proposed cell microfossils are from ____ year-old rocks.
A) ​3.5 billion
B) ​1.25 billion
C) ​1.8 billion
D) ​1.5 billion
E) ​500 million

Quizplus · Accepted Answer

The oldest proposed cell microfossils are from 3.5 billion year-old rocks. This discovery is important because it suggests that life on Earth may have originated earlier than previously thought. The fossils are of small, single-celled organisms that lived in ancient waters. These organisms are believed to be the ancestors of modern bacteria.

The Oldest Proposed Cell Microfossils Are from ____ Year-Old Rocks