Hyla
Necturus
Rhacophorus
Ophisaurus
C. Rhacophorus
Salmander
Cryptobranchus
Necturus
Bufo
nucleated and round
enucleated and oval
enucleated and round
nucleated and oval
Apoda
Caudata
Anura
Cyclostomata
Cryptobranchus - hell blender
Necturus - mud puppy
Uraeotyphlus - blind worm
Alytes - midwife toad
Hyla
Bufo
Rhacophorus
Rana
ward off their enemies
attract the opposite sex
identify the same species
collect the young ones
larger in size
stronger
larger sound box
vocal sac
Amphiuma
Ichthyophis
Salamander
Necturus
blood circulation in the body.
venous system
arterial system
all of these
Uraeotyphlus
Triturus
Siren
Amphiuma
Frogs
Salamander
Ichthyophis
Necturus
tympanic membrane and tympanic cavity
middle ear ossicle
eustachian tube
all of these
Elasmobranch ancestors
Amphioxis like ancestors
Crosspterygian ancestors
None of these
Hyla
Bufo
Necturus
Ophisaurus
Hyla
Uraeotyphlus
Ophisaurus
Discoglossus
thick and cornified epithelium
poorly cornified stratified squamous epithelium
a simple columnar epithelium
small microscopic scales in it
single occipital condyle and 10 pairs of cranial nerves
single occipital condyle and 12 pairs of cranial nerves
two occipital condyles and 10 pairs of cranial nerves
two occipital condyles and 12 pairs of cranial nerves
lizards
rabbits
salmanders
crocodiles
skull of frog
vertebrae of frog
sternum of frog
pelvis of frog
Anura
Apoda
Gymnophiona
Urodela
it can get its food easily in water
its hindlimbs are webbed and help in swimming
it respires through skin
it can see through its transparent eye lids while swimming
development of sturdy eggs
change over to herbivorous feeding
occurence of metamoophosis on amphibia
evolution of terrestrial habit
Ichthyopsida
Ichthyopsaurus
Ichthyodactyla
Pterodactyla
pronephric kidney
mesonephric kidney
metanephric kidney
both (a) and (b) ,
toads
frogs
salamanders
lizards
Ichthyophis
Sharks
Rays
Cuttlefish
Gill slits in adults
Long vertebral column
Tail in adults
Teeth in both the jaws
have two auricles and one ventricle
have smooth moist skin
have a cloaca
respire by lungs in adult stage
Ram tigrina
Hyla
Rhacophorus
Amphiuma
Salamandar
Discoglossus
Necturus
Amphiuma