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Patterns of biological evolution during the Phanerozoic Era.
It is an educational content of CK-12 Foundation (to access some of the CK-12 contents you must be logged in).
Hipervinculo Geología
Enter the periods of prehistory into the box
It is an educational content by JetPunk, site that contains a wide variety of quizzes.
Hipervinculo Geología
Enter the names of each geologic time period in their respective places.
It is an educational content by JetPunk, site that contains a wide variety of quizzes.
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