Amphiuma
Ichthyophis
Salamander
Necturus
B. Ichthyophis
larger in size
stronger
larger sound box
vocal sac
Amphiuma
Ichthyophis
Salamander
Necturus
a single body segment each
a multiple number of body segments each
a single and from multiple segments respectively
none of these
Ichthyopsida
Ichthyopsaurus
Ichthyodactyla
Pterodactyla
Frog
Necturus
Toad
Hyla
Oviparous
Eggs non-mosaic
fertilisation external
Cleavage-meroblastic
Cryptobranchus - hell blender
Necturus - mud puppy
Uraeotyphlus - blind worm
Alytes - midwife toad
Cryptobranchus - hell bender
Necturus - mud puppy
Amphiuma - congo cell
Rhacophorous - flying frog
nucleated and round
enucleated and oval
enucleated and round
nucleated and oval
Hyla
Necturus
Rhacophorus
Ophisaurus
thick and cornified epithelium
poorly cornified stratified squamous epithelium
a simple columnar epithelium
small microscopic scales in it
axial skeleton
appendicular skeleton
exoskeleton
visceral skeleton
Ram tigrina
Hyla
Rhacophorus
Amphiuma
feed
breathe
drink water
none of these
dry
scaly
moist
both (a) and (c)
Anura
Apoda
Urodela
Caudata
ward off their enemies
attract the opposite sex
identify the same species
collect the young ones
tympanic membrane and tympanic cavity
middle ear ossicle
eustachian tube
all of these
pronephric kidney
mesonephric kidney
metanephric kidney
both (a) and (b) ,
Uraeotyphlus
Triturus
Siren
Amphiuma
toads
frogs
salamanders
lizards
lizards
rabbits
salmanders
crocodiles
Alytes - midwife toad
Hyla - tree frog
Necturus - mud puppy
Bufo - common toad
skull of frog
vertebrae of frog
sternum of frog
pelvis of frog
Elasmobranch ancestors
Amphioxis like ancestors
Crosspterygian ancestors
None of these
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
Hyla
Uraeotyphlus
Ophisaurus
Discoglossus
Hyla
Bufo
Necturus
Ophisaurus
Hyla
Bufo
Rhacophorus
Rana
Oesophagus
Rectum
Duodenum
Intestine