The Cambrian Explosion

Question

The Cambrian explosion
A)caused a lack of air in Earth's atmosphere.
B)was caused by an increase in volcanic activity.
C)was volcanic in nature.
D)increased the diversity of animal life on Earth.

Accepted Answer

The Cambrian explosion is known for being a time of great diversification of animal life on Earth, with the sudden appearance of many new phyla and body plans. It was not caused by a lack of air or an increase in volcanic activity, although it did occur during a time of increased volcanic activity.