Stromatolites are
A)layered rocklike structures formed by cyanobacteriA.
B)the earliest known arthropods.
C)autotrophs living around deep sea vents.
D)heterotrophs found in marine environments.
E)fossilized coral reefs.

Question

Quizplus · Accepted Answer

Stromatolites are layered rocklike structures that are formed by cyanobacteria. These bacteria are photosynthetic autotrophs that trap sediment and minerals to create structures that can persist for thousands of years. Stromatolites are some of the oldest forms of life found on Earth, dating back over 3 billion years.

Stromatolites Are