Pectoral fins are not clearly marked off from the body in
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Cod liver oil is a rich source of
The tympanum is absent in
Water into the gills of fishes passes through
The fish used to control spread of malaria is
Homocercal tail fin with symmetrical upper and lower lobes is present in
Air bladder in fishes does not help in
Which one of the cartilaginous fishes posses an operculum over the gill ?
The function of swim bladder in fishes is mainly
In sharks, the scales are
Which of the following fishes lack claspers, used for internal fertilization in cartilaginous fishes…
Parental care by males is found in
A group of cartilaginous fishes specialised for bottom dwelling is
Placoid scales are found in
Heterocercal tail fin is a characteristic of which group of fishes?
The saw fish Pristis is a member of the class
Which of the following does not have lateral line organs ?
A homocercal tail is found in
Chondrichthyes differs from Osteichthves in
In Scoliodon, the thermoreceptors are
The pair of fins seen on either side of cloaca of fishes are the
The flying fish Exocoetus belongs to the class
Chondricthyes is not characterised by the presence of
Anandromous fishes are those which
Torpedo is a name for
The pair of fins found near the operculum in bony fishes is known as
Parental care is a characteristic of
Sea horse is a
Which of the following is not characteristic of chondricthyes ?
Which of the following is a Shark ?
A muscular fin, aiding in propulsion is
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