9
Practical Exercise 1. What is the biggest possible size a dinosaur could be?

Dinosaurs2

Embed Size (px)

Citation preview

Page 1: Dinosaurs2

Practical Exercise 1.

What is the biggest possible size a dinosaur could be?

Page 2: Dinosaurs2

Were Dinosaurs Warm-Blooded?

Page 3: Dinosaurs2

Warm-blooded versus Cold-blooded?

• Ectothermic (cold-blooded)– Relies on external heat

• Endothermic (warm-blooded)– Relies on internal heat

Page 4: Dinosaurs2

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).

?

?

?

?

Page 5: Dinosaurs2

Evidence for Warm-Blooded Dinosaurs…

• Bone structure and Histology

Page 6: Dinosaurs2

• Dinosaur behaviour

Evidence for Warm-Blooded Dinosaurs…

John Conway

Features such as long legs suggest fast running.

Page 7: Dinosaurs2

• Predator to prey ratios

Evidence for Warm-Blooded Dinosaurs…

Page 8: Dinosaurs2

• Arctic dinosaurs

Evidence for Warm-Blooded Dinosaurs…

Page 9: Dinosaurs2

1. Dinosaur size

2. The Mesozoic climate (warm and mild)

3. Reptiles today have scales as did dinosaurs

4. Absence of respiratory turbinates in dinosaurs

Evidence for Cold-Blooded Dinosaurs…