History of Life on Earth Video Lessons

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Problem: This question concerns the epochs of the Cenozoic Era. Columns (B) and (C) in the answer table may be determined directly from the information in Figure 5-9. However, the entries for column (D) Duration must be arithmetically determined. Note: Entries for columns (B) and (C) are designated as (mya) which is an abbreviation for millions of years ago; entries for column (D) are designated as (my), which stands for millions of years. 

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This question concerns the epochs of the Cenozoic Era. Columns (B) and (C) in the answer table may be determined directly from the information in Figure 5-9. However, the entries for column (D) Duration must be arithmetically determined. Note: Entries for columns (B) and (C) are designated as (mya) which is an abbreviation for millions of years ago; entries for column (D) are designated as (my), which stands for millions of years. 

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