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Scientists believe that the oldest known fossil discoveries to date are that of _________.

A. ammonites
B. trilobites
C. Tyrannosaurus rex
D. stromatolites

Respuesta :

a is the correct answer because the oldest fossil known as at the very bottom so they are ammonites
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Scientists believe that the oldest known fossil discoveries to date are that of stromatolites. ca: 3.7 billion years old.

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