In a fish aquarium green aquatic plants are grown for
Oxygen
Carbon dioxide
Fish food
Decoration
Correct Answer :
A. Oxygen
Related Questions
The function of swim bladder in fishes is mainly
sound production
respiratory
locomotion
hydrostatic
In sharks, the scales are
placoid
cycloid
ctenoid
rhombiod
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
The pair of fins seen on either side of cloaca of fishes are the
pelvic fins
cloacal fins
anal fins
caudal fins
Fish scales originate from one of the following?
Endoderm
Mesoderm
Ectoderm
Integument
The fish used to control spread of malaria is
Pterois
Fistularia
Gambusia
None of these
Which one of the cartilaginous fishes posses an operculum over the gill ?
Trygon
Torpedo
Chimaera
Sphynta
Mermaid purse is
a shell
egg case of skate fishes
a colony of skate fishes
none of these
In fishes, the lateral line receptors are
olfactoreceptors
rheoreceptors
gustoreceptors
chemoreceptors
An anamniote group is
Primates
Aves
Crocodiles
Pisces
Air bladder in fishes does not help in
respiration
sound production
excretion
movement
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
Cod liver oil is a rich source of
vitamin A
iron
calcium
vitamin B complex
Fillibranch gills are present in
all types fishes
only cartilaginous fishes
only bony fishes
sea dwelling fishes
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
Chondricthyes is not characterised by the presence of
Placoid scales
Ventral mouth
Operculum
Five pairs of gill slits
Air baldder in fishes does not help in
respiration
excretion
movement
none of these
Salmon is an example of
anandromous migration
catadromous migration
cartilaginous fish
none of these
A fish is characterised by the presence of
pharyngeal gills
paired fins
dermal scales
all 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 saw fish Pristis is a member of the class
Osteichthyes
Chondrichthyes
Dipnoi
Holocephali
In Scoliodon, the thermoreceptors are
ampullae of lorenzini
lateral line system
stato-acoustic organs
neuromast organs
A well developed swim bladder is seen in fishes which
live at the bottom of rivers
live in shallow streams
are active swimmers
live in sea water
Homocercal tail fin with symmetrical upper and lower lobes is present in
Scoliodon
Electric ray
Whale
Lung fish
Placoid scales are found in
cartilaginous fishes
bony fishes
lung fishes
paleontological fishes
Which of the following does not have lateral line organs ?
Whale
Tadpole
Aquatic urodeles
Common Indian dog fish
Torpedo, the electric ray, could give a shock of about
10 volts
100 volts
50 volts
150 volts
The pair of fins found near the operculum in bony fishes is known as
anterior fins
ray fins
pectoral fins
paired fins
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