Kahn Academy Natural History Flashcards
1
Q
Pterosaurs
A
Flying reptiles
2
Q
Plesiosaurs
A
Ocean dwelling reptiles
3
Q
A defining feature of a dinosaur
A
A hole in their hip socket-
permitted upright stance and allowed dinosaurs to run faster than other reptiles of the same size.
4
Q
Why are modern birds classified as a type of dinosaur?
A
Because they share a common ancestor with non avian dinosaurs.
5
Q
Two Dinosaur sub-categories
A
Ornithischians- bird hipped dinosaurs
Saurischians- reptile hipped dinosaurs
6
Q
Key evolutionary innovation of dinosaurs
A
Walk with a fully erect posture, holding their hind legs vertically under their hips.
