Sparrow
Hyla
Mouse
Bufo
B. Hyla
Hyla
Necturus
Rhacophorus
Ophisaurus
toads
frogs
salamanders
lizards
development of sturdy eggs
change over to herbivorous feeding
occurence of metamoophosis on amphibia
evolution of terrestrial habit
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
ward off their enemies
attract the opposite sex
identify the same species
collect the young ones
Cryptobranchus - hell blender
Necturus - mud puppy
Uraeotyphlus - blind worm
Alytes - midwife toad
nucleated and round
enucleated and oval
enucleated and round
nucleated and oval
They have middle ear apparatus
They show parental cafe
They lose tail and gills during metamorphosis
All of these
Amphiuma
Ichthyophis
Salamander
Necturus
pronephric kidney
mesonephric kidney
metanephric kidney
both (a) and (b) ,
thick and cornified epithelium
poorly cornified stratified squamous epithelium
a simple columnar epithelium
small microscopic scales in it
Elasmobranch ancestors
Amphioxis like ancestors
Crosspterygian ancestors
None of these
Frogs
Salamander
Ichthyophis
Necturus
Ram tigrina
Hyla
Rhacophorus
Amphiuma
skull of frog
vertebrae of frog
sternum of frog
pelvis of frog
Apoda
Caudata
Anura
Cyclostomata
Hyla
Bufo
Necturus
Ophisaurus
blood circulation in the body.
venous system
arterial system
all of these
have two auricles and one ventricle
have smooth moist skin
have a cloaca
respire by lungs in adult stage
Alytes - midwife toad
Hyla - tree frog
Necturus - mud puppy
Bufo - common toad
Uraeotyphlus
Triturus
Siren
Amphiuma
more terrestrial
more aquatic
more aerial
none of these
feed
breathe
drink water
none of these
neoteny
paedogensis
paedomorphosis
none of these
Anura
Apoda
Gymnophiona
Urodela
Frog
Necturus
Toad
Hyla
Oesophagus
Rectum
Duodenum
Intestine
Necturus
Pipa
Amblyostoma
Cryptobranchus
Oviparous
Eggs non-mosaic
fertilisation external
Cleavage-meroblastic
Salmander
Cryptobranchus
Necturus
Bufo