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WorksheetsBivalve Mollusks
Total questions: 20
Worksheet time: 12mins
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.
Which group of Molluscs does the picture belong to?
a)
Gastropod
b)
Bivalve
c)
Cephalopod
6.
What Mollusc group does the snail belong to?
a)
Gastropod
b)
Bivalve
c)
Cephalopod
7.
How do Bivalves eat?
a)
Filter feeders
b)
Radula
c)
Tentacles
8.
Which part of the Mollusc body contains organs?
a)
Foot
b)
Visceral Mass
c)
Trochophore
d)
Mantle
9.
Which class of Molluscs include clams, scallops, and mussels?
a)
Gastropods
b)
Bivalves
c)
Cephalopods
10.
The oldest and thickest part of the bivalve shell is called the
a)
periostracum
b)
operculum
c)
umbo
d)
valve
11.
Which of these bivalves have eyes along the edge of their mantle?
a)
scallop
b)
oyster
c)
mussel
d)
clam
12.
What type of gastropod is pictured?
a)
tulip snail
b)
cowry snail
c)
abalone
d)
nudibranch
13.
What muscle is used by bivalves to close their shells tightly to keep predators out?
a)
longitudinal
b)
retractors
c)
circular
d)
adductor
14.
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
15.
Which of the following is the organ used by Mollusks for excretion?
a)
gills
b)
nephridia
c)
mantle
d)
visceral mass
16.
Which part of the Mollusk body is specialized for burrowing, feeding, and movement?
a)
trochophores
b)
visceral mass
c)
mantle
d)
foot
17.
Which of the following is the correct description of respiration in Mollusks?
a)
They use diffusion through their moist skin and gills in marine environments
b)
They use primitive lungs in marine environments and gills on land.
c)
They use nephridia to exchange oxygen and carbon dioxide
d)
They use gills in marine environments and primitive lungs on land.
18.
What type of body do all Mollusks have?
a)
Segmented
b)
Soft
c)
Rigid
d)
Clear
19.
Pearls are created by material called
a)
nacre
b)
calcium
c)
phosphorus
d)
carbon
20.
Gastropods have this many shells
a)
1
b)
2
c)
1 or 2
d)
No shells
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