Placoid scales are found in
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Sharks and rays can be distinguished by
An anamniote group is
Which of the following does not have lateral line organs ?
Fish scales originate from one of the following?
Mermaid purse is
Most venomous fish is
The tympanum is absent in
In sharks, the scales are
Chondricthyes is not characterised by the presence of
The function of swim bladder in fishes is mainly
Water into the gills of fishes passes through
Sea horse is a
In a fish aquarium green aquatic plants are grown for
A group of cartilaginous fishes specialised for bottom dwelling is
In Scoliodon, the thermoreceptors are
The saw fish Pristis is a member of the class
Which of the following is not true about bony fishes ?
Anandromous fishes are those which
Study of sharks and rays is known as
Torpedo, the electric ray, could give a shock of about
A homocercal tail is found in
A fish is characterised by the presence of
Homocercal tail fin with symmetrical upper and lower lobes is present in
Fishes swim in water because they have
The fish used to control spread of malaria is
The pair of fins seen on either side of cloaca of fishes are the
Fillibranch gills are present in
Pectoral fins are not clearly marked off from the body in
Which of the following is not characteristic of chondricthyes ?
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