Dinosaurs2

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    14-May-2015
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Transcript of Dinosaurs2

  • 1.Practical Exercise 1.What is the biggest possible size a dinosaur could be?

2. Were Dinosaurs Warm-Blooded? 3. Warm-blooded versus Cold-blooded? Ectothermic (cold-blooded) Relies on external heat Endothermic (warm-blooded) Relies on internal heat 4. Warm-Blooded Dinosaur Theory? ???cc. Arno / Coen Above: Thermal image showing the difference between an ectothermic snake (black/ blue) that is eating an endothermic mouse (red/ yellow). 5. Evidence for Warm-BloodedDinosaurs Bone structure and Histology 6. Evidence for Warm-BloodedDinosaurs Dinosaur behaviour Features such as long legs suggest fast running. John Conway 7. Evidence for Warm-Blooded Dinosaurs Predator to prey ratios 8. Evidence for Warm-BloodedDinosaurs Arctic dinosaurs 9. Evidence for Cold-BloodedDinosaurs1. Dinosaur size2. The Mesozoic climate (warm and mild)3. Reptiles today have scales as did dinosaurs4. Absence of respiratory turbinates in dinosaurs