olfactoreceptors
rheoreceptors
gustoreceptors
chemoreceptors
B. rheoreceptors
anandromous migration
catadromous migration
cartilaginous fish
none of these
live at the bottom of rivers
live in shallow streams
are active swimmers
live in sea water
a shell
egg case of skate fishes
a colony of skate fishes
none of these
all types fishes
only cartilaginous fishes
only bony fishes
sea dwelling fishes
Oxygen
Carbon dioxide
Fish food
Decoration
dorsal
ventral
caudal
pelvic
Dasyatis
Chimaera
Sphyma
Torpedo
Placoid scales
Heterocercal tail fin
Ventrally placed mouth
Operculum
having gills not covered by operculum
presence of lateral line system
presence of large scales
presence of terminal mouth
Coelocanth
Diodon
Sturgeon
Labeo
the nature of their scales
the position of the mouth
the position of gill slits
the kind of the tail fin
a rounded body with ventral gill clefts
a flattened body with dorsal gill clefts
a flattened body with ventral gill clefts
any of these
Endoderm
Mesoderm
Ectoderm
Integument
mollusc
mammal
star fish
bony fish
10 volts
100 volts
50 volts
150 volts
Shark
Cod
Amia
Both (a) and (b)
olfactoreceptors
rheoreceptors
gustoreceptors
chemoreceptors
Whale
Tadpole
Aquatic urodeles
Common Indian dog fish
anterior fins
ray fins
pectoral fins
paired fins
Scoliodon
Electric ray
Whale
Lung fish
vitamin A
iron
calcium
vitamin B complex
respiration
excretion
movement
none of these
dog fish
bony fishes
both (a) and (b)
all fishes
Osteichthyes
Chondrichthyes
Dipnoi
Holocephali
Dipnoi
Osteichthyes
Cyclostomata
Chondrichthyes
cartilaginous fishes
bony fishes
lung fishes
paleontological fishes
sawfish
seahorse
electric ray
sucker fish
ampullae of lorenzini
lateral line system
stato-acoustic organs
neuromast organs
Primates
Aves
Crocodiles
Pisces
electric fish
saw fish
stone fish
dog fish