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Phylum Mollusca

Total questions: 36

Worksheet time: 27mins

Name
Class
Date
1.
What type of body do all Mollusks have?
a)
Segmented
b)
Soft
c)
Rigid
d)
Clear
2.
In what type of environment do MOST mollusks live?
a)
Soil
b)
Freshwater
c)
Marine
d)
Terrestrial
3.

Which class of Mollusks includes snails and slugs?

a)

Cephalapods

b)

Bivalves

c)

Gastropods

4.
Which part of the Mollusk body is specialized for burrowing, feeding, and movement?
a)
trochophores
b)
visceral mass
c)
mantle
d)
foot
5.
Which class of Mollusks include organisms that all have two shells?
a)
Gastropods
b)
Bivalves
c)
Cephalopods
6.
Which part of the Mollusk body is the tissue covering the body and secretes the shell?
a)
Mantle
b)
Trochophore
c)
Foot
d)
Visceral Mass
7.

Which class of Mollusks include organisms that have eyes similar to humans?

a)

Gastropods

b)

Bivalves

c)

Cephalopods

8.
Which class of Mollusks is the only class with some terrestrial species?
a)
Gastropods
b)
Bivalves
c)
Cephalopods
9.
Which class of Mollusks all have tentacles?
a)
Gastropods
b)
Bivalves
c)
Cephalopods
10.
How are all mollusks similar to annelids?
a)
They have shells
b)
The have trochophore larvae
c)
They are segmented
d)
They live in marine environments
11.
What type of symmetry do MOST mollusks have?
a)
Bilateral
b)
Radial
c)
Circular
d)
Asymmetrical
12.
Which class of Mollusks have the most advanced nervous system?
a)
Gastropods
b)
Bivalves
c)
Cephalopods
13.
Which of the following is the correct description of reproduction in Mollusks?
a)
Mostly asexual
b)
Budding
c)
Regeneration
d)
Mostly sexual
14.
Which of the following is the organ used by Mollusks for excretion?
a)
gills
b)
nephridia
c)
mantle
d)
visceral mass
15.
Which class of Mollusks have a closed circulatory system?
a)
Gastropods
b)
Bivalves
c)
Cephalopods
d)
All of the classes
16.

Which class of Mollusks have many species that are sessile?

a)

Gastropods

b)

Bivalves

c)

Cephalopods

17.
Which class of Mollusks include clams, oysters, and mussels?
a)
Gastropods
b)
Bivalves
c)
Cephalopods
18.
Which class of Mollusks include squid, cuttlefish and octopus?
a)
Gastropods
b)
Bivalves
c)
Caphalopods
19.
What Mollusk group does the picture belong to?
a)
Gastropod
b)
Bivalve
c)
Cephalopod
20.
What Mollusk group does the picture belong to?
a)
Gastropod
b)
Bivalve
c)
Cephalopod
21.

Which part of the mollusk contains the heart, digestive and reproductive organs?

a)

radula

b)

head-foot

c)

visceral mass

d)

trochopore

22.
Mollusk's tongue-like strip covered with teeth that point backward is called the ____
a)
trochopore
b)
radula
c)
gills
d)
visceral mass
23.
The muscles that hold the mollusk shell closed are the _____.
a)
opercula
b)
ganglia
c)
adductors
d)
chromatophores
24.
Bivalves don't have radula because they_____. 
a)
have two shells
b)
use gills instead
c)
are filter feeders
d)
don't eat meat
25.
What Mollusk group does this picture belong to?
a)
 Bivalves
b)
Gastropods
c)
Cephalopods
d)
Cnidarians
26.
Which of the types of Molluska translates to "stomach-foot?"
a)
Gastropoda
b)
Bivalva
c)
Cephalapoda
d)
Nematoda
27.
The smooth and shiny inner layer of the molluscan shell is called the
a)
nacreous
b)
periostracum
c)
primatic
d)
ectostracum
28.

Octopuses use their suckers on their tentacles to

a)

Smell, taste, grab things, and crawl.

b)

see under water

c)

change directions

d)

grow back

29.

What is one thing octopuses do to protect themselves from predators?

a)

Octopuses pretend like they are sleep.

b)

Octopuses use their heads to fight.

c)

Octopuses do not protect themselves.

d)

Octopuses squirt ink into the water.

30.
Which octopus is very dangerous?
a)
The blue ringed octopus
b)
The mimic octopus
c)
The pacific octopus
d)
The sand octopus
31.

What does an octopus use to help it eat food like clams, crabs, and lobsters?

a)

a rock

b)

it eats them whole

c)

its tentacles

d)

its beak-like jaw

32.
How many arms does a squid have?
a)
one
b)
eight
c)
three
d)
ten
33.
In squid, the water jet is responsible for
a)
Locomotion
b)
Reproduction
c)
Feeding
d)
Paralyzing prey
34.
# 2 is pointing to the squid's
a)
Mantle
b)
Water Jet 
c)
Eye 
d)
Fins 
35.
Which of these cephalopods has an external shell?
a)
cuttlefish
b)
squid
c)
octopus
d)
nautilus
36.
The cells in skin of cephalopods that allow them to change colors are called
a)
pigmentocytes
b)
chromatophores
c)
dermatophores
d)
branchiocytes

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