Lec 18 part 2

Question 1

What does competition model say success of carniverous dinosaurs with different ways of walking cause?

Answer 1

decline of large bodied herbivorous mammal like reptiles during middle triassic

Question 2

What did the dissappearance of large therapid herbivores give opportunity to rise?

Answer 2

Large herbivore dinosaurs

Question 3

What is the opportunistic model of the rise of dinosaurs

Answer 3

the therapids disappeared for some unknown reason and the dinosaurs took advantage, diversified and filled empty ecological niches

Question 4

What are 4 important physical characteristics of dinosaurs

Answer 4

1. diapsid skulls (2 hole openings)
2. teeth (specialized and complex)
3. 2 different pelvis structures
   a. saurichia b. ornitshia
4. orientation of legs

Question 5

what key to dinosaur success?

Answer 5

orientation of legs

Question 6

What stimulated development of dinosaur bipedal posture (walk on 2 legs upright?

Answer 6

1. ancestors lived in swamps
2. aquatic life stimulated development of
   a. hind limbs and
   b. fore limbs that efficient at grabbing/catching food

Question 7

What climate change did improved bipedal posture increase chances for survival?

Answer 7

increase in arid dry conditions during mesozoic

Question 8

What misconception exist about dinosaur motion?

Answer 8

slow and lumbering

Question 9

what misconception exist about dinosaur intelligence

Answer 9

very dumb needed two brains

Question 10

what misconception exist about where dinosaurs could live?

Answer 10

Jurassic sauropods so large could only live in swamps (water) that helped support their weight

Question 11

What misconception exists about color?

Answer 11

all dull black or dark green grey

Question 12

what misconception exists about dinosaur food source?

Answer 12

that they ate cavemen

Question 13

How many major divisions of dinosaurs are there?

Answer 13

2

Question 14

What are two divisions of dinosaurs?

Answer 14

1. saurischia 2. ornithschia

Question 15

What 2 groups of saurischia division ?

Answer 15

theropoda and sauropodmorphs

Question 16

what group of saurischia division were the killers of the Mesozoic?

Answer 16

Theropoda

Question 17

What are 3 dinosaurs of saurishchia killer group?

Answer 17

1. allosaurs 2. tyrannosaur 3. velociraptors

Question 18

What 3 groups of ornithischia? hint T.O.M

Answer 18

1. orniothopods 2. thyreophora 3. margioncephalia

Question 19

what does ornithischia mean?

Answer 19

bird hipped

Question 20

what did ornithischia eat?

Answer 20

herbivores

Question 21

what an example of ornithiopods

Answer 21

hadrosaurs

Question 22

what 2 example thyreophora?

Answer 22

1. stegosaurus 2. anklyosaurus

Question 23

what 2 examples of marginocephalis?

Answer 23

1.Ceratopsian 2. pachycephalosaurus

Question 24

What dinosaur is the dragon of the sky called?

Answer 24

pterosaurus

Question 25

Where do flying dinosaurs gain access to food compared to other dinosaurs?

Answer 25

flying dinosaurs get access to food that is also in the air

Question 26

what 2 advantages did flying give pterosaurus

Answer 26

improved mobility and maneuverablity

Question 27

How did improved mobility and maneuverability help flying dinosaurs?

Answer 27

made search for food and shelter rapid and efficient

Question 28

How did flying improve chance for survival of pterosaurus?

Answer 28

could escape predators by flying away

Question 29

How did flight change where pterosaurus lived?

Answer 29

flight led to migration

Question 30

how did migration through flight benefit pterosaurus

Answer 30

1. allowed travel by season
2. travel to favorable climate
3. favorable food supply
4. favorable nesting site

Question 31

what did flight make possible for pterosaurus

Answer 31

1. dispersal over long distance

2. over geographic barriers