Stromatolites are rocklike columns composed of:
A) protists.
B) dinoflagellates.
C) microbial biofilms.
D) heterotrophic organisms.
E) photosynthetic eukaryotes.

Question

Quizplus · Accepted Answer

Stromatolites are formed by the layering of microbial biofilms, particularly cyanobacteria, which are photosynthetic prokaryotes, not eukaryotes or specific types of protists or heterotrophic organisms.

Stromatolites Are Rocklike Columns Composed Of