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    Biology Concepts and Investigations Study Set 1
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    Exam 15: The Origin and History of Life
  5. Question
    Which of the Following Did Not Occur During Precambrian Time
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Which of the Following Did Not Occur During Precambrian Time

Question 18

Question 18

Multiple Choice

Which of the following did not occur during Precambrian time?


A) photosynthesis evolved
B) eukaryotes arose
C) O2 accumulated in the Earth's atmosphere
D) life originated
E) ancestors of all modern animals appeared

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