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A group of cartilaginous fishes specialised for bottom dwelling is

A. sharks

B. whales

C. lung fishes

D. rays

Correct Answer :

D. rays


Related Questions

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The oldest living fish is

A. Coelocanth

B. Diodon

C. Sturgeon

D. Labeo

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In fishes, the lateral line receptors are

A. olfactoreceptors

B. rheoreceptors

C. gustoreceptors

D. chemoreceptors

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Rays have

A. a rounded body with ventral gill clefts

B. a flattened body with dorsal gill clefts

C. a flattened body with ventral gill clefts

D. any of these

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A group of cartilaginous fishes specialised for bottom dwelling is

A. sharks

B. whales

C. lung fishes

D. rays

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4

An anamniote group is

A. Primates

B. Aves

C. Crocodiles

D. Pisces

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Chondricthyes is not characterised by the presence of

A. Placoid scales

B. Ventral mouth

C. Operculum

D. Five pairs of gill slits

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Which one of the cartilaginous fishes posses an operculum over the gill ?

A. Trygon

B. Torpedo

C. Chimaera

D. Sphynta

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Sharks and rays can be distinguished by

A. the nature of their scales

B. the position of the mouth

C. the position of gill slits

D. the kind of the tail fin

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Homocercal tail fin with symmetrical upper and lower lobes is present in

A. Scoliodon

B. Electric ray

C. Whale

D. Lung fish

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Which of the following is not true about bony fishes ?

A. Five pairs of gills covered with operculum

B. Homocercal tail

C. Eight pairs of gills

D. Any of these

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Torpedo, the electric ray, could give a shock of about

A. 10 volts

B. 100 volts

C. 50 volts

D. 150 volts

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Air baldder in fishes does not help in

A. respiration

B. excretion

C. movement

D. none of these

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The tympanum is absent in

A. dog fish

B. bony fishes

C. both (a) and (b)

D. all fishes

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Mermaid purse is

A. a shell

B. egg case of skate fishes

C. a colony of skate fishes

D. none of these

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Water into the gills of fishes passes through

A. nostrils

B. mouth

C. gill slits

D. swimming bladder

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A well developed swim bladder is seen in fishes which

A. live at the bottom of rivers

B. live in shallow streams

C. are active swimmers

D. live in sea water

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A muscular fin, aiding in propulsion is

A. dorsal

B. ventral

C. caudal

D. pelvic

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Salmon is an example of

A. anandromous migration

B. catadromous migration

C. cartilaginous fish

D. none of these

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Which of the following is not characteristic of chondricthyes ?

A. Placoid scales

B. Heterocercal tail fin

C. Ventrally placed mouth

D. Operculum

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In Scoliodon, the thermoreceptors are

A. ampullae of lorenzini

B. lateral line system

C. stato-acoustic organs

D. neuromast organs

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Which of the following is a Shark ?

A. Dasyatis

B. Chimaera

C. Sphyma

D. Torpedo

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The fish used to control spread of malaria is

A. Pterois

B. Fistularia

C. Gambusia

D. None of these

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The pair of fins found near the operculum in bony fishes is known as

A. anterior fins

B. ray fins

C. pectoral fins

D. paired fins

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Pectoral fins are not clearly marked off from the body in

A. sharks

B. rays

C. whales

D. lung fishes

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Parental care is a characteristic of

A. cat fish

B. dog fish

C. flying fish

D. seahorse

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A homocercal tail is found in

A. teleosts

B. sharks

C. lung fishes

D. rays

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The saw fish Pristis is a member of the class

A. Osteichthyes

B. Chondrichthyes

C. Dipnoi

D. Holocephali

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Heterocercal tail fin is a characteristic of which group of fishes?

A. cartilaginous fishes

B. bony fishes

C. both (a) and (b)

D. all fishes except sharks

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Which of the following fishes lack claspers, used for internal fertilization in cartilaginous fishes ?

A. Sharks

B. Stingray

C. Dogfish

D. Catfish

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Cod liver oil is a rich source of

A. vitamin A

B. iron

C. calcium

D. vitamin B complex