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The two major groups of dinosaurs were the Ornithischia and the _________________________.
Saurischia
Legless reptiles belong to the order Squamata. ________
T
The Mesozoic Era is often called the Age of Reptiles. ______
T
an animal that controls its body temperature by varying its position in the environment is an ectotherm. ________
T
Reptiles whose jaws are covered by horny ridges belong to the order _________
Testudines
A reptile's skin is one adaptation that enables it to survive in a(an) ____________________ environmen
land
The ____________________ is the ventral part of a turtle's shell.
plastron
The group of reptiles whose heart is most like that of a human is the __________
Crocodilians
in a reptile's egg, the amnion stores wastes produced by the embryo. _______
F,allantois
Reptiles that live mainly in water excrete most of their nitrogenous wastes in the form of uric acid. _______
F,amminoa
A reptile is a vertebrate that has moist skin. ___________
F,dry
A four-legged reptile that has a "third eye" and lacks both a shell and external ears is a lizard. ________
F,tuatara
The earliest known reptiles lived during the
c. Carboniferous Period.
The vertebral column exhibits the least flexibility among reptiles in the order
c. Testudines
The difference between reptilian eggs and amphibian eggs is that reptilian eggs
c. are surrounded by a protective shell and membranes.
Compared with the limbs of most amphibians, the limbs of some reptiles tend to be
c. located farther beneath the body.
Most reptiles exchange gases through their
c. lungs.
Which of the following is NOT thought to have contributed to the extinction of the dinosaurs?
c. the rising of sea level
In reptiles that live entirely on land, excess water is absorbed from urine in the _______________
cloaca
Into what two major groups are dinosaurs classified?
d. Saurischia and Ornithischia
In what way is the body plan of a snake different from that of a typical reptile?
d. Snakes have no legs.
The tuatara belongs to the order
d. Sphenodonta.
A four-chambered heart is found in
d. alligators
A small animal crouches 1 m in front of a pit viper in total darkness. A gentle breeze is blowing in the direction from the viper toward the small animal. The viper will have the greatest chance of detecting the small animal if the small animal
d. is warmer than its surroundings.
As the geographic range of a species becomes more limited, the extinction of that species becomes more likely. By this criterion, which group of reptiles faces the greatest threat of extinction?
d. tuataras
Suppose you know that vertebrate X has lungs and lays eggs with several protective membranes. What else would you need to know about vertebrate X to determine if it is a reptile?
d. what its skin is like
The dorsal part of a turtle's shell is called the
a. carapace
One method snakes use to locate prey is to flick their tongue in the air and then draw their tongue across the roof of their mouth. In this method, the function of the tongue is to
a. collect chemicals in the air.
Oxygen-rich and oxygen-poor blood undergo the least mixing in the heart of a
a. crocodile
Which of the following is NOT an adaptation that enables reptiles to live out of water?
a. having two limb girdles
All reptiles reproduce by
a. internal fertilization, and most are oviparous.
One reason for the first great adaptive radiation of reptiles was that
a. reptiles could reproduce away from water.
An egg in which the embryo is protected by several membranes is called a(an) ____________________ egg.
amniotic
Which reptile would be most likely to excrete nitrogenous wastes in the form of uric acid?
b. a desert tortoise
A survey of the number of dinosaur fossils over different geologic periods would show
b. a sharp decrease around the end of the Cretaceous Period.
Most lizards have all of the following EXCEPT
b. a third eye.
One way an ectotherm can warm its body is to
b. bask in the sun.
The only places on Earth where most reptiles cannot live are very
b. cold areas.
Caimans and gavials belong to the order
b. crocodilia
