cgboy20 cgboy20
  • 03-04-2021
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contestada

When did the Paleozoic Era begin?
4 billion years ago
550 million years ago
66 million years ago
400 million years ago

Respuesta :

hekmatawalkhil
hekmatawalkhil hekmatawalkhil
  • 03-04-2021

Answer:

550 million years ago

Explanation:

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