What did all known Proterozoic animal fossils not have?
1 Answer
Jul 3, 2018
hard bodies, or shells.
Explanation:
All the Pre Cambrian fossils were soft bodied. Many the Cambrian fossils have shells, and hard bodies. There are no transitional fossils that show the gradual change from soft bodied organism in the PreCambrian to the hard bodied Cambrian.
