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Alex73 [517]
3 years ago
6

I need help from 20-23

Biology
1 answer:
Mashcka [7]3 years ago
3 0
20. The answer is 1 (Precambrian)
21. The answer is 4 (Pennsylvanian)
22. The answer is 2 (Bony Fishes, Dinosaurs, and Mammals)
23. The answer is 2 (Reptiles)
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