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1

What chordate subphylum includes animals with endoskeletons?
A)Urochordata
B)Cephalochordata
C)Vertebrata
D)Radiata
2

What characteristic is not typical of the chordates?
A)notochord
B)pseudocoelom
C)pharyngeal pouches
D)postanal tail
3

What is unusual about the tunicates among animals?
A)protective covering containing cellulose
B)brightly colored
C)gill slits
D)hermaphroditic
4

The lancelets have a(n) __________ circulatory system that _________a heart.
A)open; possesses
B)closed; lacks
C)open; lacks
D)closed; possesses
5

The modern organism that most closely resembles the ancestor to vertebrates is/are ____________.
A)the sea squirts
B)the ascidians
C)the urochordates
D)amphioxus
6

What trend is not seen in the progression from the invertebrate chordates to the vertebrates?
A)the notochord is more pronounced
B)jaws developed from gill supports
C)jaws made possible the evolution of a central nervous system
D)evolution of lungs and limbs enabled life on land
7

Vertebrates that retain eggs and give birth to live offspring are ____________.
A)viviparous
B)oviparous
C)ovoviviparous
8

Vertebrates that lack protective embryonic membranes are _____________.
A)amniotes
B)anamniotes
C)nonexistent
9

Many fish possess a ____________ that allows them to adjust their buoyancy.
A)lateral line
B)hollow bony skeleton
C)swim bladder
D)cranial radiator
10

Many fish have the ability to detect ___________ that helps them detect predators, prey, and possible mates.
A)sound
B)light
C)vibrations and electrical fields
D)All of these are correct.
11

The first jawed fishes were most likely the ____________.
A)ostracoderms
B)placoderms
C)hagfishes
D)lampreys
12

Sharks can detect vibrations of potential prey using ___________.
A)a cranial radiator
B)a lateral line system
C)sonar
D)special receptors on tentacles
13

Most of the common fishes belong to what group?
A)lungfishes
B)lobe-finned fishes
C)ray-finned fishes
D)All of these groups are nearly equally common.
14

What challenge of living on land did the amphibians not fully conquer?
A)adequate oxygen uptake
B)adequate sensory perception
C)prevention of drying of eggs
D)overcoming the force of gravity
15

Which of these is not an amphibian trait?
A)chromatophores
B)four-chambered heart
C)respiration through skin
D)bony skeleton
16

True or false. Frogs are distinguished from toads based on skin dryness and time spent on land.
A)True
B)False
17

Salamanders exhibit ______________, showing features in the adults that were present in ancestral larval stages.
A)camouflage
B)metamorphosis
C)paedomorphosis
D)chromatophores
18

Reptilian adaptations to life on land include all of these except _________.
A)efficient excretory systems
B)amniote eggs
C)cerebral cortex expansion
D)external fertilization
19

True or false. The reptilian amniote egg with its protective outer layers is a landmark in evolution of life on land.
A)True
B)False
20

True or false. Birds are considered to be modern-day dinosaurs.
A)True
B)False
21

How are birds adapted for flight?
A)body shape
B)feathers
C)hollow bones
D)All of these are correct.
22

What unique new evolutionary trait(s) is/are evident in birds?
A)endothermy
B)four-chambered hearts
C)ectothermy
D)scales
E)Both a and b are correct.
F)All of these are correct.
23

Flightless birds, known as ___________, have sternums that are not keeled.
A)ratites
B)carinates
C)precocial
D)altricial
24

____________ mammals, such as kangaroos, have a pouch in which immature young nurse and develop.
A)Monotreme
B)Placental
C)Marsupial
D)None of these is correct.
25

True or false. Mammals probably arose from the amphibians.
A)True
B)False
26

What is/are distinguishing trait(s) that separate mammals from other animal groups?
A)anucleate red blood cells
B)two sets of teeth
C)mammary glands and hair
D)sebaceous oil glands
E)All of these are correct.
27

To what group do humans belong?
A)suborder Prosimii
B)suborder Anthropoidea
C)order Chiroptera
D)order Cetacea





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