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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

Correct Answer :

C. the position of gill slits


Related Questions

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4

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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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

Water into the gills of fishes passes through

A. nostrils

B. mouth

C. gill slits

D. swimming bladder

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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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4

Study of sharks and rays is known as

A. Saurology

B. Traumatology

C. Torpedology

D. Ichthyology

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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

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

The pair of fins seen on either side of cloaca of fishes are the

A. pelvic fins

B. cloacal fins

C. anal fins

D. caudal fins

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4

Cod liver oil is a rich source of

A. vitamin A

B. iron

C. calcium

D. vitamin B complex

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4

Which fish is famous for cod liver oil ?

A. Shark

B. Cod

C. Amia

D. Both (a) and (b)

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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

Sea horse is a

A. mollusc

B. mammal

C. star fish

D. bony fish

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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

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

Fillibranch gills are present in

A. all types fishes

B. only cartilaginous fishes

C. only bony fishes

D. sea dwelling fishes

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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 oldest living fish is

A. Coelocanth

B. Diodon

C. Sturgeon

D. Labeo

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4

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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4

The function of swim bladder in fishes is mainly

A. sound production

B. respiratory

C. locomotion

D. hydrostatic

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4

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

A. Trygon

B. Torpedo

C. Chimaera

D. Sphynta

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4

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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4

The flying fish Exocoetus belongs to the class

A. Dipnoi

B. Osteichthyes

C. Cyclostomata

D. Chondrichthyes

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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

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

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

Most venomous fish is

A. electric fish

B. saw fish

C. stone fish

D. dog fish

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4

Parental care by males is found in

A. hippocampus

B. labeo

C. anabes

D. none of these

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4

A group of cartilaginous fishes specialised for bottom dwelling is

A. sharks

B. whales

C. lung fishes

D. rays

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4

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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4

In fishes, the lateral line receptors are

A. olfactoreceptors

B. rheoreceptors

C. gustoreceptors

D. chemoreceptors