Answers

2016-01-02T22:13:35+08:00
Yes! that's why other sciencetest discover a unordinary things under ground like fossils. And only modern phylum with an adequate fossil record to appear after the Cambrian was the phylum Bryozoa, which is not known before the early Ordovician. A few mineralized animal fossils, including sponge spicules and probable worm tubes, are known from the Vendian period immediately preceding the Cambrian.
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