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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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4

Strike out the odd things :

A. Crab

B. Aretticola

C. Milipede

D. Centipede

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4

A wood boring mollusc, well known for causing damage to ships and docks is

A. Teredo

B. Doris

C. Loligo

D. Octopus

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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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4

Shipworm is

A. an annelid

B. an arthropod

C. an echinoderm

D. a mollusc

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4

An example of a true limpet is

A. Sepia

B. Loligo

C. Patella

D. Nautilus

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4

Which of the following invertebrate phylum has the eye structure nearest to that of vertebrates ?

A. Annelida

B. Moliusca

C. Echinodermata

D. Arthropoda

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4

Osphradium is to test purity of water in

A. Pila

B. Starfish

C. Housefly

D. Earthworm

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4

A wood boring mollusc is

A. patella

B. limax

C. teredo

D. chiton

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4

The generic name of apple snail is

A. Pila

B. Aplysia

C. Helix

D. Aphrodite

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4

Prehensile tentacles of Cephalopoda are derived from

A. thoracic appendages

B. foot

C. head appendages

D. none of these

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4

Sea hare is the common name of

A. Sepia

B. Octopus

C. Aplysia

D. Doris

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4

Internal shell is present in

A. Sepia

B. Lamellidens

C. Chiron

D. Pila

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4

'Pearl mother layer' is

A. prismatic layer

B. periostracum

C. nacre

D. mantle

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4

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

Ink glands as a means of escape from predators are present in

A. Sepia (Caphalopoda)

B. Uttio (Pelecypoda)

C. Dentalium (Scaphopoda)

D. Pila (Gastropoda)

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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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4

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

Pectan is commonly called

A. scallop

B. sea mussel

C. razor shell

D. any of these

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4

The elephant tusk shell is

A. dentalium

B. cypraea

C. nautilus

D. pinctada

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4

Sea foam which is drifted to the sea shores is a/an

A. external shell of cuttle fish

B. internal shell of cuttle fish

C. bones of octopus

D. calcareous matter of cuttle fish

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4

Bivalve shell is found in the members of

A. Caphalopoda

B. Gastropoda

C. Pelecypoda

D. Scaphopoda

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4

Sepia belongs to class

A. Amphineve

B. Gastropoda

C. Scaphopoda

D. Caphalopoda

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4

Well marked cephalistion is found in

A. Gastropoda

B. Caphalopoda

C. Bivalvia

D. Scaphopoda

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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

The common name of Octopus is

A. cuttlefish

B. squid

C. flying squid

D. devil fish

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4

The respiratory organs in a freshwater mussel are

A. book lungs

B. pulmonary sacs

C. gills

D. respiratory siphons

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4

The respiratory organs in a fresh water mussel are

A. pulmonary sac

B. ctenidia

C. book lungs

D. trachea

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4

A group of molluscs with 4 large ctenidia is presented by

A. Nautilus

B. Pila

C. Argpnata

D. Unio

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4

Exclusively marine molluscs are

A. Caphalopods

B. Scaphopods

C. Bivalva

D. Gastropods

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4

Scientific name of shipworm is

A. Pholas

B. Teredo

C. Solen

D. Dentalium