Which one of the cartilaginous fishes posses an operculum over the gill ?
Trygon
Torpedo
Chimaera
Sphynta
Correct Answer :
C. Chimaera
Related Questions
Fillibranch gills are present in
all types fishes
only cartilaginous fishes
only bony fishes
sea dwelling fishes
Air bladder in fishes does not help in
respiration
sound production
excretion
movement
Salmon is an example of
anandromous migration
catadromous migration
cartilaginous fish
none of these
Which of the following is not characteristic of chondricthyes ?
Placoid scales
Heterocercal tail fin
Ventrally placed mouth
Operculum
The saw fish Pristis is a member of the class
Osteichthyes
Chondrichthyes
Dipnoi
Holocephali
Parental care by males is found in
hippocampus
labeo
anabes
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
Which of the following is a Shark ?
Dasyatis
Chimaera
Sphyma
Torpedo
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
In sharks, the scales are
placoid
cycloid
ctenoid
rhombiod
The oldest living fish is
Coelocanth
Diodon
Sturgeon
Labeo
Homocercal tail fin with symmetrical upper and lower lobes is present in
Scoliodon
Electric ray
Whale
Lung fish
The pair of fins seen on either side of cloaca of fishes are the
pelvic fins
cloacal fins
anal fins
caudal fins
An anamniote group is
Primates
Aves
Crocodiles
Pisces
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
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
A fish is characterised by the presence of
pharyngeal gills
paired fins
dermal scales
all of these
The fish used to control spread of malaria is
Pterois
Fistularia
Gambusia
None of these
The flying fish Exocoetus belongs to the class
Dipnoi
Osteichthyes
Cyclostomata
Chondrichthyes
Water into the gills of fishes passes through
nostrils
mouth
gill slits
swimming bladder
Anandromous fishes are those which
live in sea water and migrate to fresh water rivers and lakes for breeding
live in fresh water and migrate to sea for breeding
both (a) and (b)
none of these
Fish scales originate from one of the following?
Endoderm
Mesoderm
Ectoderm
Integument
Torpedo, the electric ray, could give a shock of about
10 volts
100 volts
50 volts
150 volts
In Scoliodon, the thermoreceptors are
ampullae of lorenzini
lateral line system
stato-acoustic organs
neuromast organs
A homocercal tail is found in
teleosts
sharks
lung fishes
rays
Which of the following fishes lack claspers, used for internal fertilization in cartilaginous fishes ?
Sharks
Stingray
Dogfish
Catfish
In fishes, the lateral line receptors are
olfactoreceptors
rheoreceptors
gustoreceptors
chemoreceptors
The function of swim bladder in fishes is mainly
sound production
respiratory
locomotion
hydrostatic
Air baldder in fishes does not help in
respiration
excretion
movement
none of these
Chondrichthyes differs from Osteichthves in
having gills not covered by operculum
presence of lateral line system
presence of large scales
presence of terminal mouth