Question

in what eradid the first skeletal elements, soft bodies metazones and animal traces exist?
A. cenozoic era
B. mesozoic era
C. paleozoic era
D. late proterozoic​

Answer 1

Explanation:

The Cambrian explosion or Cambrian radiation was an event approximately 541 million years ago in the Cambrian period when practically all major animal phyla started appearing in the fossil record. It lasted for about 13 – 25 million years and resulted in the divergence of most modern metazoan phyla.

Answer 2

Answer:

D

Explanation:

Yun yung nasa answer sheet wala naman akong nakita sa copy... pa b0 b0 tayo ng pa b 0 b0 sa modules