Download Mollusca Worksheet

Name: ____________________________ Block: _______ Date: ___________________
BIOLOGY 11
Mollusca Worksheet
1. For what purpose do mollusks use their muscular foot?
2. How is the muscular foot of a squid different from that of clams and snails?
3. What is a mantle and where is it located in most mollusks?
4. What is contained in the visceral mass?
5. How do most sessile and burrowing mollusks obtain food?
6. What kind of digestive tract do mollusks have?
7. How do the nervous systems of clams and octopuses differ?
8. How do mollusks reproduce; sexually, asexually, or both?
9. Where does fertilization take place in mollusks?
Name: ____________________________ Block: _______ Date: ___________________
BIOLOGY 11
10. Complete the table below.
Traits
Examples
Polyplacophora Gastropods
chitons
Body
Covering
Bivalaves
Clams,
oysters
Unshelled or
one-piece
shell
Habitats
No external
shells
Most are
marine, some
freshwater
Circulatory
Open
System
(open/closed)
Nervous
System
Very simple;
two pairs of
longitudinal
nerve cords
Method or
structure for
obtaining
food
Radula
Cephalopods
Aquatic
Open
Simple;
ganglia
located in
visceral mass
and muscular
foot
Predators;
have strong
tentacles and
beak for
gathering
food