Early biological activity may be found in rocks by investigating ____.
A) stromatolites
B) isotope ratios
C) microfossils
D) all of these are correct
E) none of these are correct

Question

Quizplus · Accepted Answer

All of these options (stromatolites, isotope ratios, and microfossils) are methods through which scientists can investigate and find evidence of early biological activity in rocks. Stromatolites are layered structures formed by the activities of microbial communities, isotope ratios can indicate biological processes, and microfossils are direct fossilized remains of tiny organisms.

Early Biological Activity May Be Found in Rocks by Investigating