'Pearl mother layer' is
prismatic layer
periostracum
nacre
mantle
Correct Answer :
C. nacre
Related Questions
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
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
The largest clam of Indian ocean is
Unio
Mytilus
Teredo
Tridacna
Pectan is commonly called
scallop
sea mussel
razor shell
any of these
A wood boring mollusc is
patella
limax
teredo
chiton
Ink glands as a means of escape from predators are present in
Sepia (Caphalopoda)
Uttio (Pelecypoda)
Dentalium (Scaphopoda)
Pila (Gastropoda)
Exclusively marine molluscs are
Caphalopods
Scaphopods
Bivalva
Gastropods
A radula is typically found in
Unio
Vila
Mytilus
Loligo
The method of induction of foreign particles between the mantle and the shell of the pearl oyster and thus stimulating the pearl formation, was introduced in Japan by
Mikimoto
Katu
Haeckel
Von Mohl
Which of the following includes culminate unsegmented organisms ?
Annelida
Arthropoda
Mollusca
Chordata
Aplysia, a marine mollusc is commonly known as
devilfish
cuttlefish
black mussel
sea hare
Which of the following invertebrate phylum has the eye structure nearest to that of vertebrates ?
Annelida
Moliusca
Echinodermata
Arthropoda
The reduced foot and tubular sheil is present in
Gastropoda
Scaphopoda
Bivalva
Cephalopoda
Shipworm is
an annelid
an arthropod
an echinoderm
a mollusc
The scientific name of sea mouse is
Chaetopterus
Aphrodite
Amphihite
Limidus
A wood boring mollusc, well known for causing damage to ships and docks is
Teredo
Doris
Loligo
Octopus
The respiratory organs in a fresh water mussel are
pulmonary sac
ctenidia
book lungs
trachea
Sea hare is the common name of
Sepia
Octopus
Aplysia
Doris
Strike out the odd things :
Crab
Aretticola
Milipede
Centipede
An example of a true limpet is
Sepia
Loligo
Patella
Nautilus
A mollusc which is adapted to an amphibious mode of life is
sea hare
Pond snail
fresh water mussel
chiton
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
The intermediate host of liver fluke are fresh water snails
limax and helix
pila and helix
lymnaea and planorbis
none of these
Devil fish is the common name of
Sepia
Loligo
Octopus
Mytilus
The common name of Octopus is
cuttlefish
squid
flying squid
devil fish
Which of the following produces a shell of great ornamental value ?
Pila
Unio
Mytilus
Nautilus
The largest invertebrate is
giant clam
giant squid
giant Snail
giant octopus
'Pearl mother layer' is
prismatic layer
periostracum
nacre
mantle
Cypraea belong to class
Pelecypoda
Scaphopoda
Bivalva
Gastropoda