This art work shows life on the sea bottom,at a time when fishes and creatures with shells appeared on Earth.What time period is represented?

Question

Quizplus · Accepted Answer

The appearance of fishes and creatures with shells on Earth suggests that this artwork represents the Paleozoic era, which spanned from about 541 to 252 million years ago. The Mesozoic era is known for the rise of the dinosaurs and the Cenozoic era is known for the evolution of mammals, making them less likely choices. The Precambrian era predates the appearance of complex life forms like fishes and creatures with shells.

This Art Work Shows Life on the Sea Bottom,at a Time