The most common Precambrian fossils are ________,layered mounds of calcium carbonate.
A)prokaryotes
B)chert
C)trilobites
D)eukaryotes
E)stromatolites

Question

Quizplus · Accepted Answer

Stromatolites are the most common Precambrian fossils, which are layered mounds of calcium carbonate formed by the activity of photosynthetic prokaryotes. Precambrian rocks are over 2.5 billion years old and contain abundant evidence of the earliest life forms. Chert is a type of sedimentary rock, trilobites are extinct marine arthropods that lived during the Paleozoic Era, and eukaryotes are a more complex type of organism that evolved later in Earth's history.

The Most Common Precambrian Fossils Are ________,Layered Mounds of Calcium