How Long Did the Proterozoic Eon Last

question 71

Multiple Choice

How long did the Proterozoic eon last?

• A)approximately 500 million years
• B)approximately 1 billion years
• C)approximately 2 billion years
• D)approximately 4 billion years

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Rapid or direct means of obtaining or using something, often in the context of computer software or information retrieval.

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