Chapter 24 - Animals 2: The Chordates

Question 1

All chordates have (a) ____________.

a. backbone
b. jaws
c. notochord
d. both b and c

Answer 1

c. notochord

Question 2

The lancelet Pharynx functions in _________.

a. respiration
b. filter-feeding
c. reproduction
d. both a and b

Answer 2

d. both a and b

Question 3

Vertebrate jaws evolved from __________.

a. gill supports
b. ribs
c. scales
d. teeth

Answer 3

a. gill supports

Question 4

Lampreys and sharks both have ________.

a. jaws
b. a bony skeleton
c. a cranium
d. a swim bladder
e. a four-chambered heart
f. lungs

Answer 4

c. a cranium

Question 5

A divergence from ________ gave rise to tetrapods.

a. ray-finned fishes
b. lizards
c. cartilaginous fishes
d. lobe-finned fishes

Answer 5

d. lobe-finned fishes

Question 6

Reptiles, including birds, belong to one major lineage of amniotes, and ___________ belong to another.

a. sharks
b. frogs and toads
c. mammals
d. salamanders

Answer 6

c. mammals

Question 7

Reptiles are adapted to life on land by ____________.

a. tough skin
b. internal fertilization
c. good kidneys
d. amniote eggs
e. both a and c
f. all of the above

Answer 7

f. all of the above

Question 8

The closest modern relatives of birds are ___________.

a. crocodilians
b. prosimians
c. turtles
d. lizards

Answer 8

a. crocodilians

Question 9

Only birds have __________.

a. a cloaca
b. a four-chambered heart
c. feathers
d. amniote eggs

Answer 9

c. feathers

Question 10

An Australopith is a(n) ____________.

a. craniate
b. vertebrate
c. hominoid
d. amniote
e. placental mammal
f. all of the above

Answer 10

f. all of the above

Question 11

Homo erectus ______________.

a. was the earliest member of the genus Homo
b. was one of the australopiths
c. evolved in Africa and dispersed to many regions
d. disappeared as the result of an asteroid impact.

Answer 11

c. evolved in Africa and dispersed to many regions

Question 12

True or false? Primates are endotherms.

Answer 12

True

Question 13

Match the organisms with the appropriate description.

\_\_\_ lancelets
\_\_\_ fishes
\_\_\_ amphibians
\_\_\_ primates
\_\_\_ birds
\_\_\_ monotremes 
\_\_\_ marsupials
\_\_\_ placental mammals
\_\_\_ hominids

a. pouched mammals
b. invertebrate chordates
c. feathered amniotes
d. egg-laying mammals
e. humans and close relatives
f. have grasping hands with nails
g. first land tetrapods
h. most diverse mammal lineage
i. most diverse vertebrates

Answer 13

Match the organisms with the appropriate description.

(b) lancelets
(i) fishes
(g) amphibians
(f) primates
(c) birds
(d) monotremes
(a) marsupials
(h placental mammals
(e) hominids

a. pouched mammals
b. invertebrate chordates
c. feathered amniotes
d. egg-laying mammals
e. humans and close relatives
f. have grasping hands with nails
g. first land tetrapods
h. most diverse mammal lineage
i. most diverse vertebrates