dinosaurs chapter 3 test

Stegosaurus is a(n)


Identify each dinosaur that belongs to the Stegosaur group of ornithischians

Spinosaurus, Stegosaurus, Anodontosaurus

Which of the following dinosaurs in the Jurassic Period had a feeding niche similar to that of modern elk and deer?

Pachycephalosaurus, Stegosaurus

What was the main method of predator defense Sauropelta had?


What information do we need to figure out what Euoplocephalus used its tail club for?

how far the tail could swing from side to side, how hard the tail could hit things, could the tail break if it hit things to hard

Have we proven that Euoplocephalus used its tail club to defend itself against predators?


Which of the following does a paleontologist not need to know in order to calculate the force with which an ankylosaur could swing its tail.

the adaptive function of the tail

A broad and plate-like flange on the forward surface of the shoulder blade

acromial process

Bone plates embedded in the skin


Contact between upper and lower teeth; necessary for chewing


Flowering plants


Highly socialized;regularly moving in flocks or herds.


In locomotion, the rate at which the feet hit the ground


One of the two monophyletic groups comprising Dinosauria


Paired elongate bones in the throat that form a support for the tongue

hyoid bones

Size, shape, and behavioral differences between sexes

sexual dimorphism

Teeth that lie against the cheeks

cheek teeth

I have a huge head and three horns. I can grow to over 6000 kg, I am a herbivore.


What is a shared derived character of pachycephalosaurs?

thick, domed skull

Which of these sets of dinosaurs lived in the same place at the same time?

Triceratops and pachycephalosaurs

Was Pachyrhinosaurus a ceratopsian?


Which of these animals had a dental battery?

Triceratops, Tyrannosaurus, Corythosaurus

As baby Triceratops grew up, its horns became longer relative to the other proportions of its body. This is an example of what biological phenomenon?

ontogenetic change

A bony central part of a horn, covered by a layer of keratin.

horn cores

Beaked dinosaurs of Asia and North America who, together with Pachycephalosauria, make up Marginocephalia.


Dome-headed ornithischians of North America and Asia who, together with Ceratopsia, make up Marginocephalia.


Grinding food in the mouth with teeth


In ceratopsians, a sheet of bone extending dorsally and rearward from the back of the skull, made up of the parietal and squamosal bones.


Pertaining to the distribution of organisms in space.


Relatively dense accumulation of bones of many individuals, generally composed of a very few kinds of organisms.


Selection not between all of the individuals within a species, but between members of a single sex.

sexual selection

The back of the skull


Within the same species


A cluster of closely packed cheek teeth in the upper and lower jaws, whose shearing or grinding motion is used to masticate plant matter.

dental battery

Biological development of the individual; the growth trajectory from embryo to adult.


Which of these animals are ornithopods?

Edmontosaurus, Iguanodon

How many teeth did a large hadrosaur have in its jaws at one time?


A cluster of closely packed cheek teeth in the upper and lower jaws.

Dental battery

A diverse clade of Ornithopods that includes Iguanodon and hadrosaurids.


A group of Ornithischians that are among the best known of all dinosaurs, with an extensive fossil record.


A ring of bony plates that support the eyeball within the skull

sclerotic ring

Biped and quadrupedal herbivorous ornithischian dinosaurs.




Elements that interlaced along the spine to stiffen the tail.

ossified tendons

Mobility of the upper jaw.


Not having movement between bones of the skull.


Of one type; generally, composed of one species.


Pertaining to organisms that are born relatively underdeveloped, requiring significant parental attention for survival.


Reference to skull anatomy, movement between bones of the skull.


The condition in which the young are rather adult-like in their behavior.


The evolutionary strategy of having few offspring, which are cared for by the parents.


The evolutionary strategy where organisms have lots of offspring and no parental care.