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