question

Ichthyosaurs were extinct when Mosasaurs evolved.

answer

True

question

Ichthyosarus preceded dinosaurs by some 20-30 million years.

answer

True

question

As with other plesiosaurs, the Pliosaurs also had large eyes, slightly forward, giving them overlapping fields of vision and the depth perception that comes with it.

answer

True

question

Based upon the size of ichthyosaurs, it is estimated as capable of diving to a depth of 600 meters and coming back to the surface in 20 minutes.

answer

True

question

The geologic range of mosasaurs is restricted to what period?

answer

Cretaceous

question

Like turtles, ichthyosaurs were egg-layers.

answer

False

question

The sclerotic ring is a doughnut-shaped bone surrounding the ____.

answer

Eye

question

Ichthyosaurs have short arms with strong limb girdles used for swimming.

answer

False

question

Some have likened this marine reptile to being a sauropod of the deep because of its long neck.

answer

Elasmosaurus

question

Plesiosaurs evolved during the Late Triassic and became extinct at the end of the Cretaceous (same time as dinosaurs).

answer

True

question

Propulsion of mosasaurs through the water was accomplished by ____.

answer

Undulation of the eel-like tail

question

Skulls of some mosasaurs were found with a ____, a scent sniffer used by snakes and lizards.

answer

Jacobson's organ

question

The ancestry of ichthyosaurs is uncertain but they most likely are related to the ____, a group including dinosaurs, birds, pterosaurs, lizards, snakes, etc.

answer

Diapsids

question

Fossil evidence reveals that some mosasaurs were cannibalistic.

answer

True

question

Elasmosaurs had large skulls and short necks

answer

False

question

Swimming propulsion of plesiosaurs was provided by the ____.

answer

Giant paddles

question

The diet of mosasaurs also inclined a great deal of squid-like cephalopods, particularly of the now extinct ammonites and belemnites.

answer

True

question

The first ichthyosaurs appeared during the Middle Triassic.

answer

False

question

Ichthyosaur fossils have been found on most continents.

answer

True

question

All plesiosaurs had ___, or belly ribs, that interlocked and supported the belly.

answer

Gastralia

question

The shortcoming of the volcanic hypothesis is that it fails to demonstrate the volume and type of volcanism could have accounted for the impact evidence and there can be little argument that a giant asteroid collided with Earth at precisely the time of the global extinctions.

answer

True

question

The extinction of a species occurs when the last representative of the species is no longer capable of reproducing and dies, leaving only the fossil legacy of its time on Earth.

answer

True

question

The fossil record reveals that the rate of extinction over a geologic history was not a uniform rate.

answer

True

question

The Kuiper Cloud is a large, spherical cloud of comets surround the solar system.

answer

False

question

Once the flash heating of the atmosphere by the terminal Cretaceous impact cooled, atmospheric temperatures would have risen because of the vast amount of particulate matter in the atmosphere blocking solar radiation from reaching the surface.

answer

False

question

The fossil record reveals that extinctions typically involve all forms of life (invertebrates, vertebrates, plants, etc) at similar rates.

answer

False

question

The Barringer Meteor Crater is a young (50,000 years old) crater located in this state.

answer

Arizona

question

The greatest extinction (in percent of species extinct) in history occurred at the end of this period.

answer

Permian

question

A rough estimate of the average duration of species prior to extinction is ______.

answer

About 2 million years

question

The fossil record reveals that most species extinctions were caused by changes in the natural environment.

answer

True

question

The comet head consists of a solid nucleus surround by a _____ up to 1.5 million miles in diameter.

answer

Nebulous coma

question

______ are "dusty iceballs" of rock, frozen water, and organic compounds.

answer

Comets

question

All dinosaurs became extinct at the Cretaceous/Tertiary boundary.

answer

True

question

Unlike the moon, Earth has a very active weathering process that over time remove the evidence of impacts, or at least make old ones very hard to recognize.

answer

True

question

The most famous of all extinctions occurred at the end of the ____ and marks the boundary between the Mesozoic and Cenozoic eras.

answer

Cretaceous

question

____ is a rare platinum group metal.

answer

Iridium

question

The Deccan traps of India and Pakistan, southern Brazil, and the western US all show evidence of extensive volcanism at the time of the C/T boundary.

answer

True

question

Microtekites are small, droplet-shaped silica glass cooled form molten material expelled form an impact crater.

answer

True

question

The vast majority of asteroids in our solar system are found in the Asteroid Belt between Jupiter and Pluto.

answer

False

question

In 1981, the geophysicist G. Penfield, found a bow-shaped depression near the Yucatan Peninsula town of Chicxulub tat he thought might be the C/T boundary impact crater.

answer

True

question

All pterosaurs' skulls have huge eye sockets.

answer

true

question

The 400-500 teeth in each jaw of Pterodaustro may have been used as a sieve for filtering out plankton scooped up into its mouth.

answer

true

question

Most endotherms bear live young.

answer

true

question

Ramphorhyncoids went extinct prior to the great extinction of dinosaurs at the end of the Cretaceous.

answer

true

question

In most pterosaurs, the scapula and coracoid are fused to form a

answer

scapulocoracoid

question

Pterosaurs have a global distribution.

answer

true

question

The pterosaurs diversified into several lineages during the Lower Triassic.

answer

false

question

Pterosaurs were the first vertebrates to develop flapping flight.

answer

true

question

All pterosaurs lacked teeth.

answer

false

question

The (blank) was a pterosaur membrane that extended from the fifth toe to the tail along the posterior edge of the leg.

answer

uropagatia

question

Only endothermic animals have developed the ability to fly.

answer

true

question

Which vertebrate animals were the first to be capable of powered flight?

answer

pterosaurs

question

The shape of the deltopectoral crest is used to differentiate pterosaur clades.

answer

true

question

The earliest pterosaurs are from the (blank) of Italy.

answer

Upper Triassic

question

Some Rhamphorhynchus specimens have a membranous tail vane.

answer

true

question

Which statement about pteranodons is false?

answer

They were all filter feeders. (True: They are toothless. They are the largest pterosaurs. They exhibit sexual dimorphism. They have global distribution.)

question

A decrease in abundance and diversity of pterosaurs during the Cretaceous, most probably was caused by

answer

diversification of marine birds.

question

There is no evidence that pterosaurs had body hair.

answer

false

question

Pterosaurs have a small head, relative to body size.

answer

false

question

There is no evidence of sexual dimorphism in pterosaurs.

answer

false

question

Pteranodons are among those pterosaurs exhibiting a number of anatomical differences between the sexes.

answer

true

question

The (blank) is a small membrane spanning the area between the shoulder and the wrist of pterosaurs.

answer

propatagium

question

The main wing membrane of pterosaurs is the

answer

patagium.

question

The pterosaur images in your text reveal that this South American country has a rich fossil record of these winged creatures.

answer

Brazil

question

The pterosaur humerus has a large (blank), an anterior projection for the anchoring of flight muscles.

answer

deltopectoral crest

GLY1102 Topic 35, GLY1102 Topic 37, gly 1102 topic 36

Unlock all answers in this set

Haven't found what you were looking for?

Search for samples, answers to your questions and flashcards