Chapter 27:
Mollusks and Segmented Worms
Practice Test
1.
Segmented worms that live on land move by __________.
a.
sliding on mucus
b.
powerful muscular movements in their tails
c.
shortening and lengthening their bodies
d.
lashing their tails back and forth
Hint
2.
In a closed circulatory system, the blood moves through __________.
a.
vessels into open spaces in the body
b.
vessels only
c.
vessels, the heart and open spaces in the body
d.
the mantle only
Hint
3.
Bodies of slugs are protected by __________.
a.
shells
b.
mucus
c.
exoskeletons
d.
a thick leathery covering
Hint
4.
Biologists think that mollusks and segmented worms are closely related because of their patterns during __________.
a.
movement
b.
responding to stimuli
c.
breathing
d.
early cell division
Hint
5.
Squids move by __________.
a.
powerful muscular movement in their tails
b.
creeping in tentacles
c.
jet propulsion
d.
shortening and lengthening their bodies
Hint
6.
The first animals to evolve excretory structures were ___________.
a.
cnidarians
b.
segmented worms
c.
roundworms
d.
mollusks
Hint
7.
Hermaphrodites are common among animals that __________.
a.
move rapidly
b.
use gills
c.
move slowly
d.
reproduce asexually
Hint
8.
Gastropods without shells are called __________.
a.
snails
b.
clams
c.
squid
d.
slugs
Hint
9.
One feature that all mollusks have in common is a ___________.
a.
shell
b.
head-foot
c.
similar larval stage
d.
radula
Hint
10.
Shelled gastropods may be __________.
a.
plant-eaters only
b.
plant-eaters, predators or parasites
c.
filter feeders
d.
predators only
Hint
11.
Most bivalves have __________.
a.
a mucous covering
b.
one shell
c.
a large muscular foot
d.
a closed circulatory system
Hint
12.
Segmented worms live in __________.
a.
soil only
b.
fresh water and the sea
c.
soil and fresh water
d.
soil, fresh water and the sea
Hint
13.
Having segments allows for _________.
a.
efficient responses to stimuli
b.
specialization by segments for certain functions
c.
quick movements
d.
evolution
Hint
14.
The three most common classes of mollusks are the __________.
a.
one-shelled mollusks, two-shelled mollusks and head-footed mollusks
b.
clams, snails and octopuses
c.
marine, freshwater and land mollusks
d.
shell-less mollusks, shelled mollusks and head-footed mollusks
Hint
15.
Head-footed mollusks include __________.
a.
snails, clams and slugs
b.
squid, octopuses and one-shelled mollusks
c.
squid, octopuses and two-shelled mollusks
d.
squid, octopuses and the chambered nautilus
Hint
