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    Life The Science of Biology
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    Exam 24: The History of Life on Earth
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    Which of the Following Is the Longest Period of Time
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Which of the Following Is the Longest Period of Time

Question 5

Question 5

Multiple Choice

Which of the following is the longest period of time?


A) The length of the entire Mesozoic era
B) The half-life of 40K
C) Five million years
D) The half-life of 14C
E) The time since the Cambrian explosion

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