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14. Which group experienced a significant decline in the biodiversity at the end of the Mesozoic Era? 15. During which period did Archosaurs diverge (branch off) from a common vertebrate ancestor?
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14. Which group experienced a significant decline in the biodiversity at the end of the Mesozoic Era?

15. During which period did Archosaurs diverge (branch off) from a common vertebrate ancestor?

User Kavinda Senarathne
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1. Marine life experienced the greatest decline in biodiversity.

2. The Triassic era was the time in which Archosaurs diverged from a vertebrate ancestor.
User Kevin Lee Garner
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