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Q: Approximately how much of Earth's history occurred during the Precambrian super-eon? A. 30% B. 50% C. 75% D. 90%
A: Approximately how much of Earth's history occurred during the Precambrian super-eon? Answer: D. 90%
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User: Approximately how much of Earth's history occurred during the Precambrian super-eon? A. 30% B. 50% C. 75% D. 90%

Weegy: Approximately how much of Earth's history occurred during the Precambrian super-eon? Answer: D. 90%
zcapzbaby|Points 280|

User: During which period did the first land vertebrates appear? A. Devonian B. Mississippian C. Pennsylvanian D. Permian

Weegy: D. Permian is the youngest of the Paleozoic period. [ ] ]
Controler|Points 3928|

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Asked 12/14/2013 7:49:12 PM
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