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Select the best answer Which of the following events define the Proterozoic eon? -eukaryotic cells first seen -stable continents -first bacterial fossils -Cambrian explosion -ox…

Select the best answer Which of the following events define the Proterozoic eon? -eukaryotic cells first seen -stable continents -first bacterial fossils -Cambrian explosion -ox…
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Select the best answer

Which of the following events define the Proterozoic eon?

-eukaryotic cells first seen
-stable continents
-first bacterial fossils
-Cambrian explosion
-oxygen builds up in atmosphere

asked
User Mark Zamoyta
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8.1k points

2 Answers

7 votes

Eukaryotic cells first seen

oxygen build up

stable continents

answered
User Sacherus
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8.1k points
3 votes
proterozoic eon - oxygen builds up in atmosphere. 
answered
User Johannes Wachs
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