Osphradium in molluscs is
a sensory organ for balancing
a sensory organ for smell
swimming organ
none of these
Correct Answer :
B. a sensory organ for smell
Related Questions
An example of a true limpet is
Sepia
Loligo
Patella
Nautilus
A radula is typically found in
Unio
Vila
Mytilus
Loligo
Shipworm is
an annelid
an arthropod
an echinoderm
a mollusc
Aplysia, a marine mollusc is commonly known as
devilfish
cuttlefish
black mussel
sea hare
Pearls of commercial value are produced by which of the following genera ?
Pinctada
Unio
Anodonta
Ostrea
A wood boring mollusc, well known for causing damage to ships and docks is
Teredo
Doris
Loligo
Octopus
Bivalve shell is found in the members of
Caphalopoda
Gastropoda
Pelecypoda
Scaphopoda
The generic name of apple snail is
Pila
Aplysia
Helix
Aphrodite
The best developed brain than any other invertebrate is seen in
Octopus
Sepia
Mytilus
Teredo
Which of the following includes culminate unsegmented organisms ?
Annelida
Arthropoda
Mollusca
Chordata
Sea mica is a marine mollusc. Its specific name is
Chiton
Unio
Teredo
Nautilus
Head, foot and visceral mass - this combination of characters is diagnostic of
Echinodenns
Arthropods
Molluscs
Annelida
Sea foam which is drifted to the sea shores is a/an
external shell of cuttle fish
internal shell of cuttle fish
bones of octopus
calcareous matter of cuttle fish
Sepia and Octopus are marine molluscs and their swift locomotion in water is affected by
expelling water in a jet through siphon
lashing moment of their cephalic arms
characteristic undulations of their lateral fins
none of these
Which of the following invertebrate phylum has the eye structure nearest to that of vertebrates ?
Annelida
Moliusca
Echinodermata
Arthropoda
Pectan is commonly called
scallop
sea mussel
razor shell
any of these
Which of the following produces a shell of great ornamental value ?
Pila
Unio
Mytilus
Nautilus
Well marked cephalistion is found in
Gastropoda
Caphalopoda
Bivalvia
Scaphopoda
A group of molluscs with 4 large ctenidia is presented by
Nautilus
Pila
Argpnata
Unio
'Pearl mother layer' is
prismatic layer
periostracum
nacre
mantle
The most primitive mollusc is
Neoplina
Chiton
Dentalium
Patella
A mollusc which is adapted to an amphibious mode of life is
sea hare
Pond snail
fresh water mussel
chiton
Sepia belongs to class
Amphineve
Gastropoda
Scaphopoda
Caphalopoda
The respiratory organs in a freshwater mussel are
book lungs
pulmonary sacs
gills
respiratory siphons
Cypraea belong to class
Pelecypoda
Scaphopoda
Bivalva
Gastropoda
Sea hare is the common name of
Sepia
Octopus
Aplysia
Doris
A wood boring mollusc is
patella
limax
teredo
chiton
The largest clam of Indian ocean is
Unio
Mytilus
Teredo
Tridacna
The respiratory organs in a fresh water mussel are
pulmonary sac
ctenidia
book lungs
trachea
Cephalopoda is a class of animals in which
foot is located on head
head is fused with thorax
head is located on foot
notochord extends upto cephalic region