The Cambrian explosion ___________.

Question

Quizplus · Accepted Answer

The Cambrian explosion refers to a period in Earth's history, approximately 540 million years ago, when there was a sudden increase in the diversity of animal life. It is characterized by the appearance of many new and complex body plans, including the first vertebrates and arthropods. It was not caused by a lack of air in Earth's atmosphere or an increase in volcanic activity specifically, although these may have been contributing factors.

The Cambrian Explosion ___________