Chapter 27:
Mollusks and Segmented Worms
1.
Which of these animals is a cephalopod?
a.
b.
c.
d.
Hint
2.
Which of these animals are polychaetes?
a.
plumed worms
b.
leeches
c.
nematodes
d.
earthworms
Hint
3.
Segmented worms have __________.
a.
an open circulatory system
b.
radial symmetry
c.
asymmetry
d.
a closed circulatory system
Hint
4.
Which of these is a characteristic of mollusks?
a.
a radially symmetrical body plan
b.
a pseudocoelom
c.
a muscular foot
d.
a digestive tract with one opening
Hint
5.
Which of these animals is NOT a mollusk?
a.
squids
b.
snails
c.
slugs
d.
sponges
Hint
6.
Leeches and earthworms are both __________.
a.
limpets
b.
bristleworms
c.
hermaphrodites
d.
asymmetrical
Hint
7.
Which of these statements about shelled gastropods is NOT true?
a.
Shelled gastropods are predators.
b.
Shelled gastropods are parasites.
c.
Shelled gastropods are omnivores.
d.
Shelled gastropods are herbivores.
Hint
8.
Periwinkles, conches, whelks, and slugs are all classified as __________.
a.
annelids
b.
bivalves
c.
cephalopods
d.
gastropods
Hint
9.
Which body part enables segmented worms to move?
a.
crop
b.
nephridia
c.
setae
d.
stomach foot
Hint
10.
What is the name of a snail's tonguelike organ?
a.
mantle
b.
coelom
c.
shell
d.
radula
Hint
11.
Which of these shells represents a bivalve?
a.
b.
c.
d.
Hint
12.
Which of these animals has setae?
a.
leeches
b.
scallops
c.
cuttlefish
d.
abalones
Hint
13.
Which of these is NOT a characteristic of bivalves?
a.
Bivalves are parasites.
b.
Bivalves use gill cilia in their feeding process.
c.
Bivalve species are mostly found in marine environments.
d.
Bivalves have two shells connected by a ligament.
Hint
14.
What is the function of an earthworm's gizzard?
a.
It sends messages from the earthworm's brain to its nerve fibers.
b.
It grinds the earthworm's food into small pieces.
c.
It takes food into the earthworm's body.
d.
It enables the earthworm to move.
Hint
15.
How do bivalves feed themselves?
a.
Bivalves are filter feeders.
b.
Bivalves are grazers.
c.
Bivalves are parasites.
d.
Bivalves are predators.
Hint
