What were the dominant species in the precambrian period?
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Some animals of the precambrian era were jellyfish, sponges, invertabrates and basically any kind of species that are like early versions of sea animals now. there was also preformed alge. The Precambrian Era was the era that was like the preperation for the Cambrian Time which was part of Plaezoic Era.

Some animals of the precambrian era were jellyfish, sponges, invertabrates and basically any kind of species that are like early versions of sea animals now. there was also preformed alge. The Precambrian Era was the era that was like the preperation for the Cambrian Time which was part of Plaezoic Era.

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What is precambrian dominant life form?  What animals were in the precambrian period?  What are some species of the Precambrian Era?  What of the earth was formed in the precambrian period?  What life forms was there on the Precambrian time period?