Salmander
Cryptobranchus
Necturus
Bufo
C. Necturus
Cryptobranchus - hell bender
Necturus - mud puppy
Amphiuma - congo cell
Rhacophorous - flying frog
Hyla
Necturus
Rhacophorus
Ophisaurus
Elasmobranch ancestors
Amphioxis like ancestors
Crosspterygian ancestors
None of these
toads
frogs
salamanders
lizards
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
nucleated and round
enucleated and oval
enucleated and round
nucleated and oval
Hyla
Uraeotyphlus
Ophisaurus
Discoglossus
Anura
Apoda
Gymnophiona
Urodela
skull of frog
vertebrae of frog
sternum of frog
pelvis of frog
lizards
rabbits
salmanders
crocodiles
Frogs
Salamander
Ichthyophis
Necturus
more terrestrial
more aquatic
more aerial
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
Oesophagus
Rectum
Duodenum
Intestine
Ichthyopsida
Ichthyopsaurus
Ichthyodactyla
Pterodactyla
development of sturdy eggs
change over to herbivorous feeding
occurence of metamoophosis on amphibia
evolution of terrestrial habit
Frog
Necturus
Toad
Hyla
feed
breathe
drink water
none of these
a single body segment each
a multiple number of body segments each
a single and from multiple segments respectively
none of these
axial skeleton
appendicular skeleton
exoskeleton
visceral skeleton
Alytes - midwife toad
Hyla - tree frog
Necturus - mud puppy
Bufo - common toad
have two auricles and one ventricle
have smooth moist skin
have a cloaca
respire by lungs in adult stage
Salamandar
Discoglossus
Necturus
Amphiuma
Ram tigrina
Hyla
Rhacophorus
Amphiuma
Apoda
Caudata
Anura
Cyclostomata
tympanic membrane and tympanic cavity
middle ear ossicle
eustachian tube
all of these
neoteny
paedogensis
paedomorphosis
none of these
Hyla
Bufo
Rhacophorus
Rana
pronephric kidney
mesonephric kidney
metanephric kidney
both (a) and (b) ,
Oviparous
Eggs non-mosaic
fertilisation external
Cleavage-meroblastic