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In what geological era did mammals expand on Earth?
The mammals expanded on Cenozoic era. [smile]
Expert answered|Mayang30|Points 2480|
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Asked 4/2/2014 9:54:40 AM
Updated 4/2/2014 1:49:39 PM
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This answer has been confirmed as correct and helpful.
Confirmed by sujaysen [4/2/2014 1:49:39 PM]
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Questions asked by the same visitor
Mesozoic
Weegy: the extinction of the dinosaurs.best describes the mesozoic period [ [ The boundary marks the end of the Mesozoic era and the beginning of the Cenozoic era, and is associated with the Cretaceous Paleogene extinction event, a mass extinction, [ which is considered to be the demise of the non-avian dinosaurs. ] ] User: Paleozoic Weegy: no, it was in the begining of the ceolizoic period User: Cambrian Weegy: The Cambrian is the first geological period of the Paleozoic Era, lasting from 542 ? 0.3 to 488.3 ? 1.7 million years ago. It is succeeded by the Ordovician. Its subdivisions, and indeed its base, are somewhat in flux. [ The period was established by Adam Sedgwick, who named it after Cambria, the Latin name for Wales, where Britain's Cambrian rocks are best exposed. ] User: How old is Earth according to the geological time scale? A. 290 million years old B. 542 million years old C. 2.5 billion years old D. 4.6 billion years old Weegy: D. 4.6 billion years old User: In what geological era did mammals expand on Earth? A. Cenozoic B. Mesozoic C. Paleozoic D. Phanerozoic (More)
Question
Updated 4/4/2014 3:05:26 PM
1 Answer/Comment

The Paleozoic is the earliest of three geologic eras of the Phanerozoic Eon, spanning from roughly 541 to 252.2 million years ago.

Added 4/4/2014 3:05:26 PM
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