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SCIPAD - BIG IDEAS - BOOK 2
THE BASIS OF HEREDITY
4600 542
Precambrian
542 251
Paleozoic
488
542
Cambrian
Ordovician
488 444
Silurian
444 416
Devonian
416 360
Carboniferous
360 299
299 251
Permian
251 65
Mesozoic
Triassic
251
200
200
146
Jurassic
Cretaceous
146
65
0
65 Cenozoic
65
Paleogene &Neogene
0
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