Josh4444 Josh4444

16-11-2017
Biology

contestada

What happened during the Cambrian Explosion? A. Early chordates began to appear. B. Many groups of vertebrate animals became extinct. C. Groups of dinosaurs began to evolve into the ancestors of modern birds. D. Animals evolved a variety of complex body plans.

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dudelash dudelash

16-11-2017

I am pretty sure that it's D.

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