Zoology Exam #3 Questions with
Correct Answers
The body of molluscs is divided into two main regions called the
head-foot and visceral mass
mantle and foot
visceral mass and mantle
head and foot - Answer-head-foot and visceral mass
The shell of a mollusc is secreted by the - Answer-mantle
The possible benefits of gastropods undergoing torsion include all of the following
EXCEPT
anal discharge anteriorly attracts prey items where they can now be seen
clean water enters anteriorly oriented mantle cavity opening instead of from behind
sensory organs move to head region for better detection
it allows the head to enter the large opening of the mantle cavity first for quick
escape - Answer-anal discharge anteriorly attracts prey items where they can now
be seen
The circulatory system of molluscs is - Answer-open
Conglutinates (ovisacs), which are produced by some unionids, serve what purpose?
they resemble prey items and release several hundred glochidia when punctured by
a hungry fish
each ovisac is a glochidia which eventually develops into an adult
they resemble a fish and rely on fertilization by another fish for development
they disperse via cilia and seek out and attach to fish gills - Answer-they resemble
prey items and release several hundred glochidia when punctured by a hungry fish
According to the Amazing Octopus video, the smallest octopus measures - Answer-
1.5 cm
Slugs excrete this type of solid waste
,ammonia
hosta salad
uric acid paste
dry pellets - Answer-uric acid paste
This bivalve exchanges water through an extendable siphon - Answer-geoduck
Adult unionids capture fish for
food for the fish
food for themselves
nourishing their eggs
dispersal - Answer-dispersal
Which of the following is NOT a characteristic of Moluscans?
reduced coelom
radial symmetry
trochophore larvae
head-foot and visceral mass - Answer-radial symmetry
From the Molluscs: The Survival Game video, what key evolutionary breakthrough
separated mollusks such as the nautilus from their ancestors?
fins
tentacles
jet propulsion
buoyancy - Answer-buoyancy
What do members of Pulmonata have that their aquatic relatives do not?
a pneumostome
a shell
torsion
ammonia waste - Answer-a pneumostome
, A geoduck is
a marine bivalve
a prehistoric waterfowl
a cephalopid
a unionid - Answer-a marine bivalve
These only have a shell over one half their body but they can roll up for protection -
like a pill bug
tusk shells
chitons
nautilus
trochophore larvae - Answer-chitons
A gastropod's protostyle is used in
respiration
waste excretion
food transfer
reproduction - Answer-food transfer
Members of this mollusc group can eat Cnidarians and can obtain the ability to sting
from them
Opisthobranchians
polyplacophorans
prosobranchians
cephalopods - Answer-Opisthobranchians
Mussel conglutinates
aren't actual living entities
can attach to a fish's gills
are miniature adult mussels
Correct Answers
The body of molluscs is divided into two main regions called the
head-foot and visceral mass
mantle and foot
visceral mass and mantle
head and foot - Answer-head-foot and visceral mass
The shell of a mollusc is secreted by the - Answer-mantle
The possible benefits of gastropods undergoing torsion include all of the following
EXCEPT
anal discharge anteriorly attracts prey items where they can now be seen
clean water enters anteriorly oriented mantle cavity opening instead of from behind
sensory organs move to head region for better detection
it allows the head to enter the large opening of the mantle cavity first for quick
escape - Answer-anal discharge anteriorly attracts prey items where they can now
be seen
The circulatory system of molluscs is - Answer-open
Conglutinates (ovisacs), which are produced by some unionids, serve what purpose?
they resemble prey items and release several hundred glochidia when punctured by
a hungry fish
each ovisac is a glochidia which eventually develops into an adult
they resemble a fish and rely on fertilization by another fish for development
they disperse via cilia and seek out and attach to fish gills - Answer-they resemble
prey items and release several hundred glochidia when punctured by a hungry fish
According to the Amazing Octopus video, the smallest octopus measures - Answer-
1.5 cm
Slugs excrete this type of solid waste
,ammonia
hosta salad
uric acid paste
dry pellets - Answer-uric acid paste
This bivalve exchanges water through an extendable siphon - Answer-geoduck
Adult unionids capture fish for
food for the fish
food for themselves
nourishing their eggs
dispersal - Answer-dispersal
Which of the following is NOT a characteristic of Moluscans?
reduced coelom
radial symmetry
trochophore larvae
head-foot and visceral mass - Answer-radial symmetry
From the Molluscs: The Survival Game video, what key evolutionary breakthrough
separated mollusks such as the nautilus from their ancestors?
fins
tentacles
jet propulsion
buoyancy - Answer-buoyancy
What do members of Pulmonata have that their aquatic relatives do not?
a pneumostome
a shell
torsion
ammonia waste - Answer-a pneumostome
, A geoduck is
a marine bivalve
a prehistoric waterfowl
a cephalopid
a unionid - Answer-a marine bivalve
These only have a shell over one half their body but they can roll up for protection -
like a pill bug
tusk shells
chitons
nautilus
trochophore larvae - Answer-chitons
A gastropod's protostyle is used in
respiration
waste excretion
food transfer
reproduction - Answer-food transfer
Members of this mollusc group can eat Cnidarians and can obtain the ability to sting
from them
Opisthobranchians
polyplacophorans
prosobranchians
cephalopods - Answer-Opisthobranchians
Mussel conglutinates
aren't actual living entities
can attach to a fish's gills
are miniature adult mussels
