dinosaurs

Question 1

what did dinosaurs evolve from?

Answer 1

archosaurs

Question 2

what type of eggs did dinos lay?

Answer 2

amniotic

Question 3

what is amniotic egg

Answer 3

hard shell pourous for gas exchange
aquatic environment inside
yolk sac = food

Question 4

what stage of growth did amniotic egg eliminate

Answer 4

larval stage - growth of small adult

Question 5

what were the 2 types of dinousaur

Answer 5

ornithischia

saurischia

Question 6

hip bones of ornithischian dinosuars

Answer 6

back pointing pubis (bird-hipped)

Question 7

hip bones of saurischian dinosaurs

Answer 7

forward pointing pubish (reptile-hipped)

Question 8

bird hipped

Answer 8

ornithischian

Question 9

reptile hipped

Answer 9

saurischian

Question 10

example of ornithischian dino

Answer 10

iguanadon

Question 11

2 sub groups of saurischian

Answer 11

therapod

sauropod

Question 12

example of therapod

Answer 12

tyrannosaurus

Question 13

example of sauropod

Answer 13

diplodocus

Question 14

which dino group did modern birds evolve from

Answer 14

therapod (saurischian)

Question 15

what was special about walking igunadon dinos

Answer 15

bi-pedal and quad-pedal

Question 16

characteristics of ornithischian dinos

Answer 16

bony armoured plates (DEFENCE, HEAT EXCHANGE)
duck billed
bird hips

Question 17

characteristics of saurischian dino

Answer 17

reptile hips
3 digit hands with 1st finger longest (like thumb) for grasping
s shaped neck

Question 18

diplodocus adaptions for chewing

Answer 18

gastroliths (stones) in stomach to grind leaves

Question 19

what was diplodocus

Answer 19

sauropod herbivore

Question 20

how did diplodocus defend itself

Answer 20

whip tail

Question 21

how did diplodocus reach high trees

Answer 21

tall + long neck to reach high trees

Question 22

what type of saurishian dino was tyrannasaurus

Answer 22

therapod (carnivore)

Question 23

adaptions of tyrannosaurus

Answer 23

large teeth to tear meat

large legs

Question 24

arguments for tyrannosaurs being a predator

Answer 24

large teeth- meat

many modern predators don’t use arms

Question 25

arguments for tyrannosaurs being a svaveneger

Answer 25

large olfactory lobe - smell useless forearms small eyes long legs to cover distance

Question 26

adaptions of iguanadon

Answer 26

horny beak - crop veg hinged upper jaw (back teeth chew) side to side chewing 3 digit fingers ending in hooves conical thumb with spike as defence

Question 27

how did birds evolve from dinos

Answer 27

thought to have evolved from coelurosaurs

Question 28

similarities - coelurosaurs and birds

Answer 28

clawed hands pubis bone shifting to posterior elongated arms and forelimbs light hollow bones

Question 29

what is archaepteryx

Answer 29

1st known bird like fossil

Question 30

bird qualities of archaepteryx

Answer 30

feathers wings for flight hollow bones wishbone