Fossil Steroid and Molecular Clock Evidence Suggests That Animals Originated

question 33

Multiple Choice

Fossil steroid and molecular clock evidence suggests that animals originated

• A) between 770 and 710 million years ago.
• B) more than 100 million years before the oldest known fossils of large animals.
• C) during the Cambrian explosion.
• D) after sponges diverged from other metazoans.
• E) both A and B

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