1
- Dinosaurs & mammals evolved at about the same time (in the Early
Mesozoic Era - Triassic Period).
- All dinosaurs were slow, ponderous animals.
- Although dinosaurs evolved in the Triassic, they didn't begin to dominate
the land fauna until the Jurassic.
- Dinosaurs were the dominant land vertebrates during the Jurassic &
Cretaceous Periods.
- The erect stance characterizing dinosaur posture strongly supports
their interpretation as cold-blooded reptiles.
- Dinosaurs were definitely cold-blooded (based on predator-prey ratios,
their erect stance, bone structure, apparent growth pattern).
- Dinosaurs might have been warm-blooded (based on predator-prey ratios,
their erect stance, bone structure, apparent growth pattern).
- What group(s) of terretrial reptiles dominated the Triassic
land fauna?
- A. Therapsids B. Primitive Reptiles C. Primitive Amphibians
- D. Dinosaurs E. Both A. & B.
- Dinosaurs & ____________________ (vertebrate class) evolved at
about the same time (in the Early Mesozoic Era - Triassic Period).
2
- High concentrations of iridium are found ONLY at the Cretaceous-Tertiary
boundary.