Download Mollusks - CowanScience

What is the job of adductor muscles in
clams?
Close the valves
Name three members of class
Cephalopoda.
Nautiluses, cuttlefish, squids, octopi (3)
How do cephalopods locate their prey?
Sight
The similarity between the eyes of
vertebrates and cephalopods is an
example of ___________.
Convergent evolution
Tooth shells belong to which class of
mollusk?
Scaphopoda
What is the common name for members
of the class polyplacophora?
Chitons
The diversity of body forms and lifestyles in the phylum Mollusca is an
excellent example of __________.
Adaptive radiation
In mollusks, what contains organs for
digestion, circulation, reproduction,
and excretion.
Visceral mass
What is the name of the male tentacle
modified for spermatophore transfer?
hectocotylus
What supports a mollusk’s body
Hydrostatic or hydraulic skeleton
How many described species of mollusks
are there?
100,000
Where does gas exchange occur in
bivalves?
The gills
What are the two main regions of the
mollusk body?
Aquatic gastropods’ excretory product is
mainly __________.
Ammonia
head-foot and the visceral mass
How does the mantle protect a mollusk?
secretes the shell
What is the rough structure in the
mouth of most mollusks?
Radula
What sets nautiluses apart from other
cephalopods?
Their shell
Where is the mantle cavity located?
Between the mantle and the foot
Name two organisms in the class
Gastropoda.
Slugs, snails, limpets (2)
How many degrees are turned during
torsion?
180
The mucous mass in the stomach of a
gastropod is called the ___________.
Protostyle
Which mollusk class contains the most
described species?
Gastropoda
The circulatory system of most mollusks
could be described as __________.
open
Name 2 members of class Bivalvia.
Clams, oysters, mussels, scallops, etc…
What is the name for the oldest part of a
bivalve shell?
umbo