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Unit 3 - Dinosaurs Flashcards | StudBud
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Unit 3 - Dinosaurs
Unit 3 - Dinosaurs
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Answers
1
Baron George Cuvier was influential because -
he argued that Mosasaurus was a 40-foot long dinosaur
his concept of extinction was given serious thought
he argued that Mosasaurus was still alive today
he studied giant sloth fossils
2
The diagnostic features of the Theropoda are -
carnivorous teeth
thin, hollow bones
a beak shaped like that of a parrot
thickened skull bones with knobby protuberances
3
Below is an image of the specimen dubbed "______________," the first scientific name given to a dinosaur.
Megalosaurus
Mosasaurus
Iguanodon
Scrotum humanum
4
The image below is a _________________, a characteristic feature of _______________, or duck-billed dinosaurs
dental battery; iguanodonts
dental battery; ornithopods
perforate acetabulae; iguanodonts
dental battery; hadrosaurs
5
Archaeopteryx is significant because -
it is the primitive ancestor of T. rex
it was the first fossil ever found
it was proof that birds lived with the dinosaurs
it was the first bird
6
The skull below is of a -
Ornithopod
Iguanodont
Ceratop
Pachycephalosaur
7
Dinosaurs are unique from all other reptiles in having these three key features -
Erect posture, hands with 3 main fingers, perforate acetabulae
3 or more sacral vertebrae, hands with 3 main fingers, perforate acetabulae
3 or more sacral vertebrae, hands with 2 main fingers, perforate acetabulae
Erect posture, teeth in sockets, hands with 3 main fingers
8
Why do we know so much about duck-billed dinosaurs?
They are the last dinosaurs to appear in the fossil record
We have found their nests, tracks, and remains of all ages
They are the largest dinosaurs
They are the first dinosaurs to appear in the fossil record
9
Deinonychus -
fueled what is now known as the "dinosaur renaissance"
proved that all dinosaurs were slow-moving like reptiles
is a velociraptor
proved that all dinosaurs were agile like birds and mammals
10
Most paleontologists believe -
volcanism in India led to the dinosaurs' demise
birds are most closely related to Ornithischians (bird-hips)
dinosaurs went extinct from lethal illness
birds are theropod dinosaurs
11
Oviraptors
gathered food by stealing
Protoceratops
eggs
True
False
12
How tall is _____________, the tallest dinosaur?
Sauroposeidon; 56 feet
Supersaurus; 56 feet
Sauroposeidon; 140 feet
Supersaurus; 140 feet
13
Tyrannosaurus
ran at speeds averaging 25 mph
True
False
14
The earliest dinosaurs of each major group were generally -
Fast
Slow
Small
Large
15
What does this image reveal about T. rex?
Its encephalization quotient was quite small
It had stereoscopic vision
Its cerebral cortex was highly developed
It had an acute sense of smell
16
The fastest dinosaurs were -
Ornithomimids
Toothless
Ostrich-like
All of these
17
Trace fossils -
include tracks, eggs, skin impressions, and stomach stones
are the primary means by which we learn about dinosaur biology
include coprolites
are remains of the animals themselves
18
How did
T. rex
feed?
By consuming plants but not other animals
By consuming members of their own species
Only by scavenging
Only by preying upon other animals
19
Diplodocids = the longest dinosaurs
True
False
20
In 1842, Sir Richard Owen categorized the giant fossil animals of Europe into "Dinosauria," meaning -
"Big reptiles"
"Iguana tooth"
"Living on land"
"Fearfully great reptiles"
21
A major group of ornithischians was Thyreophora, characterized by -
an extensive armor extending over the sides of the body and neck
armor or "osteoderms" like on the backs of alligators
meat-eating
plates or spikes along or beside the backbone
22
Sauropods do not have a dwarf form
True
False
23
How might pachycephalosaurs use their thickened cranium in aggressive encounters?
Ramming
Both of these
Butting
Neither of these
24
Dinosaurs are found in Florida
False
True
25
Encephalization quotient =
a measure of brain size relative to body moss
a measure of the age of troodontid teeth
a measure of the posteriority of the brain case
a measure of reaction speed relative to reaction time
26
The "Age of Dinosaurs" -
238 million years ago
65.54 million years ago
Mesozoic Era
Triassic Period
27
Therizinosaurs -
"Dino-scissor hands"
Had an enlarged claw on the second toe
Were probably the only herbivorous theropods
Crested, toothless Oviraptors
28
Troodon
was the -
Smartest dinosaur
Fastest dinosaur
Smallest dinosaur
Largest dinosaur
29
T. rex
lived until about
____
years old
50
75
20
30
30
Brontosaurs were the tallest and perhaps heaviest dinosaurs
True
False
31
Dinosaurs went extinct -
65.54 million years ago
at the end of the Jurassic period
at the end of the Triassic period
at the end of the Cretaceous Period
32
Over-splitting =
the wedge-like wear pattern that kept hadrosaur teeth continually sharp
naming more species than really exist
the formation of growth lines in the teeth of hadrosaurs
the crest growth in juvenile hadrosaurs
33
Dinosaurs grew at an equal rate with living reptiles
False
True
34
The distinguishing feature of the true Sauropods was -
extremely elongated necks
leaf-shaped teeth
nostrils on top of their heads
enlarged thumb claws
35
When dinosaurs came into existence -
There was less ground cover than there is today
Dinosaurs had more land to live on than there is today
The Earth was covered mostly in grass
Angiosperms made up the majority of the fauna