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7 September, 09:12

What happened during the Cambrian explosion?

A. groups of dinosaurs began to evolve into the ancestors of modern birds.

B. animals evolved a variety of complex body parts.

C. early chordates began toj appear.

D. Many groups of vertebrate animals became extinct.

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  1. 7 September, 09:37
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    B. animals evolved a variety of complex body parts
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