The Precambrian-Cambrian Boundary Is

question 45

Multiple Choice

The Precambrian-Cambrian boundary is

• A) A point that separates reduction environments from oxidation environments
• B) The separation point between prokaryotes and eukaryotes
• C) A point of dramatically increased fossilization, although it is likely that many animal groups existed before this time
• D) The shift-over from plants to animal life

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