Which statements can be inferred from the Paleozoic era time scale? There was volcanic activity during the Paleozoic era.
Dinosaurs existed in the middle part of the Paleozoic era.
Marine organisms existed in the early part of the Paleozoic era.
Ammonites existed before the trilobites did during the Paleozoic era
Erosion and deposition were processes that occurred during the Paleozoic era.