The primitive archosaurs were the ancestors to both modern birds and crocodiles.
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Q1: Reptiles, birds, and mammals are descended from
Q2: Dinosaurs were divided into two orders based
Q3: Dinosaurs evolved from the Saurischians.
Q4: A significant change in land-plant communities occurred
Q6: Unlike the Paleozoic burrowing animals, which were
Q7: By the end of the Mesozoic, bony
Q8: The mass extinction at the end of
Q9: The Saurischian dinosaurs are known as the
Q10: All feathered dinosaurs could fly.
Q11: Relatively few invertebrates existed at the beginning
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