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Biology 7 Online
OpenStudy (anonymous):

During which era did dinosaurs first evolve? Answer Triassic Jurassic Cretaceous none of the above

thomaster (thomaster):

I believe it was the triassic where the first mammals evolved. Dinosaurs lived in the mesozoic era, which consists of the triassic, the jurassic and the cretaceous.

OpenStudy (anonymous):

your a miracle thank you

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