In Scoliodon, the thermoreceptors are
ampullae of lorenzini
lateral line system
stato-acoustic organs
neuromast organs
Correct Answer :
A. ampullae of lorenzini
Related Questions
Most venomous fish is
electric fish
saw fish
stone fish
dog fish
The saw fish Pristis is a member of the class
Osteichthyes
Chondrichthyes
Dipnoi
Holocephali
Sharks and rays can be distinguished by
the nature of their scales
the position of the mouth
the position of gill slits
the kind of the tail fin
Mermaid purse is
a shell
egg case of skate fishes
a colony of skate fishes
none of these
Fish scales originate from one of the following?
Endoderm
Mesoderm
Ectoderm
Integument
Water into the gills of fishes passes through
nostrils
mouth
gill slits
swimming bladder
Chondricthyes is not characterised by the presence of
Placoid scales
Ventral mouth
Operculum
Five pairs of gill slits
Fishes swim in water because they have
lungs
air bladders
cartilaginous skeleton
fins
Which fish is famous for cod liver oil ?
Shark
Cod
Amia
Both (a) and (b)
In a fish aquarium green aquatic plants are grown for
Oxygen
Carbon dioxide
Fish food
Decoration
In Scoliodon, the thermoreceptors are
ampullae of lorenzini
lateral line system
stato-acoustic organs
neuromast organs
Which of the following is not true about bony fishes ?
Five pairs of gills covered with operculum
Homocercal tail
Eight pairs of gills
Any of these
In fishes, the lateral line receptors are
olfactoreceptors
rheoreceptors
gustoreceptors
chemoreceptors
A fish is characterised by the presence of
pharyngeal gills
paired fins
dermal scales
all of these
Pectoral fins are not clearly marked off from the body in
sharks
rays
whales
lung fishes
In sharks, the scales are
placoid
cycloid
ctenoid
rhombiod
Which of the following is not characteristic of chondricthyes ?
Placoid scales
Heterocercal tail fin
Ventrally placed mouth
Operculum
Rays have
a rounded body with ventral gill clefts
a flattened body with dorsal gill clefts
a flattened body with ventral gill clefts
any of these
A muscular fin, aiding in propulsion is
dorsal
ventral
caudal
pelvic
A group of cartilaginous fishes specialised for bottom dwelling is
sharks
whales
lung fishes
rays
Fillibranch gills are present in
all types fishes
only cartilaginous fishes
only bony fishes
sea dwelling fishes
Sea horse is a
mollusc
mammal
star fish
bony fish
Chondrichthyes differs from Osteichthves in
having gills not covered by operculum
presence of lateral line system
presence of large scales
presence of terminal mouth
Cod liver oil is a rich source of
vitamin A
iron
calcium
vitamin B complex
An anamniote group is
Primates
Aves
Crocodiles
Pisces
A homocercal tail is found in
teleosts
sharks
lung fishes
rays
Salmon is an example of
anandromous migration
catadromous migration
cartilaginous fish
none of these
Heterocercal tail fin is a characteristic of which group of fishes?
cartilaginous fishes
bony fishes
both (a) and (b)
all fishes except sharks
The pair of fins seen on either side of cloaca of fishes are the
pelvic fins
cloacal fins
anal fins
caudal fins
Which of the following does not have lateral line organs ?
Whale
Tadpole
Aquatic urodeles
Common Indian dog fish