The origin of the craniates occurred at roughly the same time as the
A)origin of the Ediacaran fauna.
B)Cambrian explosion.
C)Permian extinctions.
D)first invertebrates invaded land.
E)origin of lancelets.

Question

Quizplus · Accepted Answer

The Cambrian explosion, which occurred about 541 million years ago, marks the sudden appearance of diverse and complex animals with hard skeletons, including the craniates (animals with a skull that protects the brain). Therefore, the origin of craniates occurred at roughly the same time as the Cambrian explosion.

The Origin of the Craniates Occurred at Roughly the Same