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Bivalves and Gastropods

Total questions: 30

Worksheet time: 30mins

Name
Class
Date
1.
What type of symmetry do Molluscs have?
a)
Asymmetrical
b)
Bilateral
c)
Radial
2.
What type of circulatory system do most Molluscs have?
a)
Open
b)
Closed
3.
What is the meaning of Gastropod?
a)
Soft-bodied
b)
Stomach foot
c)
Head-footed
d)
Two-shelled
4.
What structure has teeth and is used by gastropods to eat?
a)
Tentacles
b)
Radula
c)
Mantle
d)
Filter feeder
5.

How do Bivalves eat?

a)

Filter feeders

b)

Radula

c)

Tentacles

d)

Beak

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.
What type of gastropod is pictured? 
a)
tulip snail
b)
cowry snail
c)
abalone
d)
nudibranch
8.
What muscle is used by bivalves to close their shells tightly to keep predators out?
a)
longitudinal
b)
retractors
c)
circular
d)
adductor
9.

Structure A is the

a)

foot

b)

mantle

c)

adductor muscle

d)

gills

10.

Structure J is the

a)

foot

b)

mantle

c)

adductor muscle

d)

gills

11.

Structures C (both sides of animal) are the

a)

siphons

b)

hearts

c)

adductor muscles

d)

gills

12.

Structure E is the

a)

umbo

b)

mantle

c)

foot

d)

kidney

13.

How are pearls formed?

a)

All bivalves form them as part of their lives!

b)

Irritant gets between shell & mantle and is covered with nacre

c)

Pearls are result of retained digestive wastes

d)

Extension of the shell formed for extra protection

14.
What is a characteristic of a gastropoda?
a)
Slimey
b)
Squishy
c)
Shells
d)
East Asia
15.
All mollusks have an external shell.
a)
True
b)
False
16.

What TYPE of mollusk is this?

a)

Bivalve

b)

Gastropod

c)

Cephalopod

17.

What TYPE of mollusk is this?

a)

Bivalve

b)

Gastropod

c)

Cephalopod

18.

Which TYPE of mollusk has ONE or NO shell?

a)

Bivalve

b)

Gastropod

c)

Cephalopod

19.
Which part of the Mollusk body is specialized for burrowing, feeding, and movement?
a)
trochophores
b)
visceral mass
c)
mantle
d)
foot
20.
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
21.

This is a

a)

blue dragon nudibranch

b)

man o war

c)

blue sponge

22.

Dangerous gastropod with a powerful venom and painful barbed stinger

a)

abalone

b)

giant conch snail

c)

cone snail

d)

nudibranch

23.

What type of mollusk?

a)

aeolid nudibranch

b)

dorid nudibranch

c)

conch

d)

whelk

24.

What type of mollusk?

a)

aeolid nudibranch

b)

dorid nudibranch

25.

What is A?

a)

gill plume

b)

mantle

c)

foot

d)

rhinophore

26.

Which is the mantle?

a)

A

b)

B

c)

C

d)

D

27.

Which is the gill plume?

a)

A

b)

B

c)

C

d)

D

28.

Which is the body whorl?

a)

26

b)

27

c)

28

d)

30

29.

Where is the aperture?

a)

26

b)

27

c)

28/29

d)

30

30.

Which group of gastropods can "steal" the stinging cells from cnidarians and store them in their own epithelial tissues in order to defend itself from predators?

a)

nudibranches

b)

conch snail

c)

all snails

d)

cone snail

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