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4

Sepia and Octopus are marine molluscs and their swift locomotion in water is affected by

A. expelling water in a jet through siphon

B. lashing moment of their cephalic arms

C. characteristic undulations of their lateral fins

D. none of these

Correct Answer :

A. expelling water in a jet through siphon


Related Questions

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Bivalve shell is found in the members of

A. Caphalopoda

B. Gastropoda

C. Pelecypoda

D. Scaphopoda

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4

The common name of Octopus is

A. cuttlefish

B. squid

C. flying squid

D. devil fish

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4

Well marked cephalistion is found in

A. Gastropoda

B. Caphalopoda

C. Bivalvia

D. Scaphopoda

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4

Sepia and Octopus are marine molluscs and their swift locomotion in water is affected by

A. expelling water in a jet through siphon

B. lashing moment of their cephalic arms

C. characteristic undulations of their lateral fins

D. none of these

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4

The scientific name of sea mouse is

A. Chaetopterus

B. Aphrodite

C. Amphihite

D. Limidus

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4

Cephalopoda is a class of animals in which

A. foot is located on head

B. head is fused with thorax

C. head is located on foot

D. notochord extends upto cephalic region

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The reduced foot and tubular sheil is present in

A. Gastropoda

B. Scaphopoda

C. Bivalva

D. Cephalopoda

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Exclusively marine molluscs are

A. Caphalopods

B. Scaphopods

C. Bivalva

D. Gastropods

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4

The most primitive mollusc is

A. Neoplina

B. Chiton

C. Dentalium

D. Patella

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The intermediate host of liver fluke are fresh water snails

A. limax and helix

B. pila and helix

C. lymnaea and planorbis

D. none of these

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4

A mollusc which is adapted to an amphibious mode of life is

A. sea hare

B. Pond snail

C. fresh water mussel

D. chiton

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A group of molluscs with 4 large ctenidia is presented by

A. Nautilus

B. Pila

C. Argpnata

D. Unio

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Prehensile tentacles of Cephalopoda are derived from

A. thoracic appendages

B. foot

C. head appendages

D. none of these

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The generic name of apple snail is

A. Pila

B. Aplysia

C. Helix

D. Aphrodite

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4

The largest invertebrate is

A. giant clam

B. giant squid

C. giant Snail

D. giant octopus

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4

Osphradium in molluscs is

A. a sensory organ for balancing

B. a sensory organ for smell

C. swimming organ

D. none of these

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4

Aplysia, a marine mollusc is commonly known as

A. devilfish

B. cuttlefish

C. black mussel

D. sea hare

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Sea hare is the common name of

A. Sepia

B. Octopus

C. Aplysia

D. Doris

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An example of a true limpet is

A. Sepia

B. Loligo

C. Patella

D. Nautilus

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Pectan is commonly called

A. scallop

B. sea mussel

C. razor shell

D. any of these

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Pteropods are small marine gastropods, often termed as

A. elephant tusk shells

B. butterflies of the sea

C. lerrfons of the sea

D. cucumbers of the sea

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4

A wood boring mollusc is

A. patella

B. limax

C. teredo

D. chiton

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The blood pigment of moliusca is

A. myoglobin

B. anthocyanin

C. haemocyanin

D. hemoglobin

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Cypraea belong to class

A. Pelecypoda

B. Scaphopoda

C. Bivalva

D. Gastropoda

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Which of the following includes culminate unsegmented organisms ?

A. Annelida

B. Arthropoda

C. Mollusca

D. Chordata

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Shipworm is

A. an annelid

B. an arthropod

C. an echinoderm

D. a mollusc

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The best developed brain than any other invertebrate is seen in

A. Octopus

B. Sepia

C. Mytilus

D. Teredo

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The largest clam of Indian ocean is

A. Unio

B. Mytilus

C. Teredo

D. Tridacna

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Sea mica is a marine mollusc. Its specific name is

A. Chiton

B. Unio

C. Teredo

D. Nautilus

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'Pearl mother layer' is

A. prismatic layer

B. periostracum

C. nacre

D. mantle