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Current Affairs January 2024

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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

A. Mikimoto

B. Katu

C. Haeckel

D. Von Mohl

Correct Answer :

A. Mikimoto


Related Questions

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The respiratory organs in a fresh water mussel are

A. pulmonary sac

B. ctenidia

C. book lungs

D. trachea

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A radula is typically found in

A. Unio

B. Vila

C. Mytilus

D. Loligo

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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

Strike out the odd things :

A. Crab

B. Aretticola

C. Milipede

D. Centipede

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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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The generic name of apple snail is

A. Pila

B. Aplysia

C. Helix

D. Aphrodite

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Osphradium is to test purity of water in

A. Pila

B. Starfish

C. Housefly

D. Earthworm

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The common name of Octopus is

A. cuttlefish

B. squid

C. flying squid

D. devil fish

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Bivalve shell is found in the members of

A. Caphalopoda

B. Gastropoda

C. Pelecypoda

D. Scaphopoda

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Aplysia, a marine mollusc is commonly known as

A. devilfish

B. cuttlefish

C. black mussel

D. sea hare

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Pearls of commercial value are produced by which of the following genera ?

A. Pinctada

B. Unio

C. Anodonta

D. Ostrea

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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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A group of molluscs with 4 large ctenidia is presented by

A. Nautilus

B. Pila

C. Argpnata

D. Unio

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Cypraea belong to class

A. Pelecypoda

B. Scaphopoda

C. Bivalva

D. Gastropoda

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Scientific name of shipworm is

A. Pholas

B. Teredo

C. Solen

D. Dentalium

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The largest clam of Indian ocean is

A. Unio

B. Mytilus

C. Teredo

D. Tridacna

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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

Identify the larva which is present only in members of gastropoda :

A. Trochophore

B. Veliger

C. Glochidium

D. Muller's larva

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4

The blood pigment of moliusca is

A. myoglobin

B. anthocyanin

C. haemocyanin

D. hemoglobin

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Head, foot and visceral mass - this combination of characters is diagnostic of

A. Echinodenns

B. Arthropods

C. Molluscs

D. Annelida

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Well developed radula is absent in

A. Gastropoda

B. Criton

C. Bivalvia

D. Monoplacophora

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Well marked cephalistion is found in

A. Gastropoda

B. Caphalopoda

C. Bivalvia

D. Scaphopoda

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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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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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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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Shipworm is

A. an annelid

B. an arthropod

C. an echinoderm

D. a mollusc

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Sepia belongs to class

A. Amphineve

B. Gastropoda

C. Scaphopoda

D. Caphalopoda

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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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Sea mica is a marine mollusc. Its specific name is

A. Chiton

B. Unio

C. Teredo

D. Nautilus

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Devil fish is the common name of

A. Sepia

B. Loligo

C. Octopus

D. Mytilus