Andrew121410 Andrew121410

30-10-2019
Biology

contestada

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

A. the appearance of fossils

B. the appearance of hard parts

C. the ability to swim

Respuesta :

johnettrouer johnettrouer

22-11-2019

Answer:

The Answer is The appearance of hard parts

Explanation:

Answer Link

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