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4

The saw fish Pristis is a member of the class

A. Osteichthyes

B. Chondrichthyes

C. Dipnoi

D. Holocephali

Correct Answer :

B. Chondrichthyes


Related Questions

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4

The saw fish Pristis is a member of the class

A. Osteichthyes

B. Chondrichthyes

C. Dipnoi

D. Holocephali

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4

The oldest living fish is

A. Coelocanth

B. Diodon

C. Sturgeon

D. Labeo

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4

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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4

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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4

Pectoral fins are not clearly marked off from the body in

A. sharks

B. rays

C. whales

D. lung fishes

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4

In fishes, the lateral line receptors are

A. olfactoreceptors

B. rheoreceptors

C. gustoreceptors

D. chemoreceptors

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4

Fish scales originate from one of the following?

A. Endoderm

B. Mesoderm

C. Ectoderm

D. Integument

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4

Salmon is an example of

A. anandromous migration

B. catadromous migration

C. cartilaginous fish

D. none of these

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4

Air bladder in fishes does not help in

A. respiration

B. sound production

C. excretion

D. movement

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4

Study of sharks and rays is known as

A. Saurology

B. Traumatology

C. Torpedology

D. Ichthyology

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4

Which of the following does not have lateral line organs ?

A. Whale

B. Tadpole

C. Aquatic urodeles

D. Common Indian dog fish

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4

Sea horse is a

A. mollusc

B. mammal

C. star fish

D. bony fish

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4

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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4

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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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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4

A fish is characterised by the presence of

A. pharyngeal gills

B. paired fins

C. dermal scales

D. all of these

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4

Torpedo is a name for

A. sawfish

B. seahorse

C. electric ray

D. sucker fish

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4

Water into the gills of fishes passes through

A. nostrils

B. mouth

C. gill slits

D. swimming bladder

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4

In sharks, the scales are

A. placoid

B. cycloid

C. ctenoid

D. rhombiod

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4

In a fish aquarium green aquatic plants are grown for

A. Oxygen

B. Carbon dioxide

C. Fish food

D. Decoration

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4

The tympanum is absent in

A. dog fish

B. bony fishes

C. both (a) and (b)

D. all fishes

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4

A homocercal tail is found in

A. teleosts

B. sharks

C. lung fishes

D. rays

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4

Air baldder in fishes does not help in

A. respiration

B. excretion

C. movement

D. none of these

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4

The fish used to control spread of malaria is

A. Pterois

B. Fistularia

C. Gambusia

D. None of these

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4

The function of swim bladder in fishes is mainly

A. sound production

B. respiratory

C. locomotion

D. hydrostatic

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4

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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4

Most venomous fish is

A. electric fish

B. saw fish

C. stone fish

D. dog fish

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4

A muscular fin, aiding in propulsion is

A. dorsal

B. ventral

C. caudal

D. pelvic

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4

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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4

In Scoliodon, the thermoreceptors are

A. ampullae of lorenzini

B. lateral line system

C. stato-acoustic organs

D. neuromast organs