Dinosaur Evolution and Distribution Flashcards
1
Q
Q: Why were Triassic and Early Jurassic dinosaurs similar worldwide?
A
A: Pangaea allowed free movement without significant sea barriers.
2
Q
Q: What Late Jurassic sauropod groups avoided food competition?
A
A: Diplodocids (selective high browsers) and macronarians (less selective, robust browsers).
3
Q
Q: What caused regional differences in dinosaur populations by the Early Cretaceous?
A
A: The breakup of Pangaea into Laurasia and Gondwana, leading to geographic isolation.
4
Q
Q: Which group thrived in Gondwana during the Late Cretaceous?
A
A: Titanosaurs, robust sauropods adapted to diverse environments.
