HELP!! "During the ______ period, the first vertebrates appeared on Earth" A. Cambrian B. Ordovician C. Silurian D. Devonian

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GusP · Answer 1 · 2020-02-11T05:55:57+0000

Answer:a

Explanation:Vertebrates originated about 525 million years ago during the Cambrian explosion, which saw the rise in organism diversity. The earliest known vertebrate is believed to be the Myllokunmingia.[

HELP!! "During the ______ period, the first vertebrates appeared on Earth" A. Cambrian B. Ordovician C. Silurian D. Devonian

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