Alytes - midwife toad
Hyla - tree frog
Necturus - mud puppy
Bufo - common toad
A. Alytes - midwife toad
Hyla
Necturus
Rhacophorus
Ophisaurus
a single body segment each
a multiple number of body segments each
a single and from multiple segments respectively
none of these
Gill slits in adults
Long vertebral column
Tail in adults
Teeth in both the jaws
feed
breathe
drink water
none of these
Salmander
Cryptobranchus
Necturus
Bufo
lizards
rabbits
salmanders
crocodiles
Uraeotyphlus
Triturus
Siren
Amphiuma
nucleated and round
enucleated and oval
enucleated and round
nucleated and oval
Cryptobranchus - hell bender
Necturus - mud puppy
Amphiuma - congo cell
Rhacophorous - flying frog
Hyla
Bufo
Necturus
Ophisaurus
Alytes - midwife toad
Hyla - tree frog
Necturus - mud puppy
Bufo - common toad
They have middle ear apparatus
They show parental cafe
They lose tail and gills during metamorphosis
All of these
Salamandar
Discoglossus
Necturus
Amphiuma
larger in size
stronger
larger sound box
vocal sac
Hyla
Bufo
Rhacophorus
Rana
Elasmobranch ancestors
Amphioxis like ancestors
Crosspterygian ancestors
None of these
development of sturdy eggs
change over to herbivorous feeding
occurence of metamoophosis on amphibia
evolution of terrestrial habit
Hyla
Uraeotyphlus
Ophisaurus
Discoglossus
tympanic membrane and tympanic cavity
middle ear ossicle
eustachian tube
all of these
Amphiuma
Ichthyophis
Salamander
Necturus
Oesophagus
Rectum
Duodenum
Intestine
have two auricles and one ventricle
have smooth moist skin
have a cloaca
respire by lungs in adult stage
thick and cornified epithelium
poorly cornified stratified squamous epithelium
a simple columnar epithelium
small microscopic scales in it
ward off their enemies
attract the opposite sex
identify the same species
collect the young ones
skull of frog
vertebrae of frog
sternum of frog
pelvis of frog
axial skeleton
appendicular skeleton
exoskeleton
visceral skeleton
Oviparous
Eggs non-mosaic
fertilisation external
Cleavage-meroblastic
Frog
Necturus
Toad
Hyla
neoteny
paedogensis
paedomorphosis
none of these
Apoda
Caudata
Anura
Cyclostomata