GLY1102 Topic 23

question

The Iguanodontia have closely packed batteries of teeth.
answer

True
question

Hadrosaurus are differentiated into two subfamilies based upon their skull characteristics, the flat-roofed or solid-crested Hadrosaurinae and the hollow-crested Lambeosaurinae.
answer

True
question

Saurolophus and Prosaurolophus are two examples of members of the Hadrosaurinae which includes those hadrosaurids with a fairly flat skull roof or head crest of solid bone.
answer

True
question

Ornithopods are not known to have been herding animals.
answer

False
question

Hadrosaurs may have had inflatable air sacs over the flat dorsal portion of the skull surrounding the external nostrils.
answer

True
question

Circumnarial depressions surrounding the nasal opening of hadrosaurines were:
answer

Probably covered by an inflatable skin sack
question

Which of the following hadrosaurs was named after a Canadian city?
answer

Edmontosaurus
question

All ornithopods were quadrupedal.
answer

False
question

Othnielia, a small member of the Hypsilophodontidae family of ornithopods, was named in honor of a famous dinosaur paleontologist, being named for the first name of _______.
answer

Marsh
question

Which of the following about hadrosaurs is false?
answer

They have a single tooth row of large teeth on each side of the jaw.
question

The so-called duck-billed hadrosaurs were restricted to the Jurassic Period.
answer

False
question

This genus of ornithopods is the type genus of an early family and clade of ornithopods and derives its name from the fact that it has different types of teeth.
answer

Heterodontosaurus
question

Computer simulations have been made of the sound once produced by the long hollow crest of this hadrosaur.
answer

Parasaurolophus
question

Which statement about the Iguanodontia is false?
answer

They had small external nostrils
question

Ossified or bony tendons in the tails of many ornithopods served to _____.
answer

Stiffen the tail
question

Ornithopods were remarkably diverse and distributed throughout the world.
answer

True
question

Lambeosaurus was a large, duck-billed dinosaur with a bony head crest shaped like a hatchet.
answer

True
question

The crests of lambeosaurines varied in species according to age and sex.
answer

True
question

The genus from the large Euornithopoda clade was bipedal, only 2-5 meters long, and exhibited the specialized chewing arrangement of more advanced ornithopods.
answer

Hypsilophodon
question

Which of the following dinosaurs had batteries of large numbers of teeth organized into large rasping surfaces?
answer

Hadrosauridae
question

This member of the Iguanodontia is intermediate in size between Dryosaurus and Iguanodon.
answer

Camptosaurus
question

The ability of ornithopods to chew on both sides of the mouth at the same time is referred to as:
answer

Bilateral occlusion
question

Which of the following plant eaters depended least on spines or plates for defense?
answer

Ornithopods
question

Most ornithopods chewed their food by allowing the upper and lower teeth to shear past each other in a chewing mechanism called:
answer

Pleurokinesis

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