question

Although some fossilized dinosaur organs have been recovered, none of these is of a heart.

answer

False

question

Bacterial infection from bites and scratches may have been lethal to dinosaurs.

answer

True

question

Three-dimensional vision occurs because each eye sees an object at a slightly different angle, therefore, projecting a slightly different image on the retina.

answer

True

question

In rare cases, internal organs may be represented as fossil molds or casts, even more rarely they are mineralized.

answer

True

question

Allosaurus and Carcharadontosaurus had binocular fields of vision half as wide and more similar to modern alligators. These dinosaurs may have ben ambush predators.

answer

True

question

Dinosaurs developed tumors, had arthritis, and suffered from diffuse idiopathic skeletal hyperostosis (DISH).

answer

True

question

The blood pressure required to pump blood from the heart to the head is a function of the distance and elevation of the head form the heart.

answer

True

question

A hatchling of this dinosaur was found in Italy with fossilized traces of muscles, large intestines, windpipe, and a liver spot.

answer

Scipionyx

question

Binocular vision occurs where the two monocular fields of view overlap and it is within the binocular range that an animal experiences depth perception.

answer

True

question

All animals have different monocular and binocular ranges of vision.

answer

True

question

Active predators tend to have a narrower range of depth perception than scavengers or ambush predators.

answer

False

question

Animals with a wide range of depth perception are more often ambush predators, lying in wait until their prey comes close and within their range of depth perception.

answer

False

question

A mature Brachiosaurus may have held its head 43 feet (13m) above the ground, more than twice the height of a giraffe.

answer

True

question

An infection of the toe on the right food of "Big Al" the Allosaurus contributed to his death.

answer

True

question

The crest of a lambeosaurines is hollow with a complex series of tubes inside, connecting to the nose and throats.

answer

True

question

Psittacosaurus is the basal member of the ceratopsian clade and the only member of the Psittacosauridae.

answer

True

question

Protoceratops bears the distinction of being one of the first dinosaurs for which specimens were found of a range ages, probably of each sex.

answer

True

question

Ceratopsians do not display sexual dimorphism.

answer

False

question

Triceratops was the smallest of all ceratopsians.

answer

False

question

Pentaceratops has five significant horns—two horns are forward pointing over the orbits, another a nasal horn, and two protruding cheekbone horns.

answer

True

question

Centrosaurus has two large frill openings (pariental fenestra) with a parietal strut dividing them.

answer

True

question

The Ceratopsidae are all large, habitually bipedal, with very large skulls, large nostrils, very prominent frills, and a variety of horns.

answer

False

question

As is the case with the Psittacosauridae, the Protoceratopsidae have no nasal or post-orbital horns, just a thickened bump in front of the orbit.

answer

True

question

Ceratopsians were very social animals, some traveling in large groups or herds of 1000 or more individuals.

answer

True

question

The Neoceatopsia were obligate bipedals.

answer

False

question

Ceratopsians became very abundant in the Late Cretaceous, especially in North America.

answer

True

question

All ceratopsians had horns on their skull.

answer

False

question

Ceratopsians are ornithischian dinosaurs and are closely related to ornithopods, both being plant-eating ornithischians.

answer

True

question

Protoceratops has no horns (nasal or post-orbital) and the nostrils are much larger than the Ceratopsidae.

answer

False

question

The frill is a shelf of bone projecting from the back of the skull.

answer

True

question

The Neoceratopsia is comprised of two families, the smaller Protoceratopsidae and the Ceratopsidae.

answer

True

question

A bony shelf on the back of the skull unites this group called the ______.

answer

Marginocephalia

question

The margins of some ceratopsian frills had extra bones called ______.

answer

Epoccipitals

question

The Ceratopsia ("horned faces") includes a relatively large group of some 20 genera, mostly from upper cretaceous of North America.

answer

True

question

Pachyrhinosaurus is a memorable ceratopsian of about 6m in length, with a short beak, and a low face with masses of very roughened bone that extend the length of the snout from the nose to eyes.

answer

True

question

Whereas Psittacosaurus has only a small rudimentary frill, the Protoceratopsidae display a much larger bony frill that extended back over the neck.

answer

True

question

All ceratopsians had a relatively large frill.

answer

False

question

Chasmosaurus has two very large openings (parietal fenestra) in the frill.

answer

True

question

While the Protoceratopsidae were bipedal, the Psittacosaurus were clearly an obligate quadrupedal.

answer

False

question

Centrosaurus has six long, bony spikes sticking out fanwise from the back of its frill.

answer

False

question

The thickened skull of ____ has led to speculation that males clashed heads with one another in competition for females during breeding season.

answer

Pachycephalosaurus

question

Most Pachycephalosaurs lived during the Late Cretaceous in ____

answer

North America and Asia

question

The Homalocephalidae were the largest pachycephalosaurs

answer

False

question

Pachycephalosaurs were all bipedal

answer

True

question

Which of the following pachycephalosaur characteristics is false?

answer

Quadrapedal

question

Pachycephalosaurs first evolved during the _____.

answer

Early Cretaceous

question

The name "Pachycephalosauria" means ____.

answer

Thick-headed

question

All known pachycephalsaurs are from the Northern Hemisphere.

answer

True

question

Pachycephalosauridae have a flat skull roof.

answer

False

question

Running, Stegoceras would have had its back almost perpendicular with the ground requiring the tail to act as a counterbalance.

answer

False

question

The Homalocephalidae family is more diverse than the Pachycephalosauridae.

answer

False

question

The Pachycephalosauria are divided into two families based upon their ____.

answer

Skull roof characteristics

question

Pachycephalosaurs were all herbivores.

answer

True

question

Unlike Stegoceras, Pachycephalosaurus has very prominent bony spikes projecting from the snout.

answer

True

question

Homalocephale from Mongolia had a relatively flat skull roof.

answer

True

GLY1102 Topic 27, GLY1102 Topic 28, GLY1102 Topic 29

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