What important event in animal evolution marks the beginning of the Cambrian period?

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asked Apr 15, 2017 196k views

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Ismatjon · Answer 1 · 2017-04-20T16:38:28+0000

The event in animal evolution that marks the beginning of the Cambrian period is the evolution of chordates and arthropods. Chordates are animals with a dorsal nerve cord and arthropods are the ancestors of crustaceans and insects. Hope this answers the question.

What important event in animal evolution marks the beginning of the Cambrian period?

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