pronephric kidney
mesonephric kidney
metanephric kidney
both (a) and (b) ,
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
Sparrow
Hyla
Mouse
Bufo
tympanic membrane and tympanic cavity
middle ear ossicle
eustachian tube
all of these
frogs
fishes
lizards
pigeons
Necturus
Pipa
Amblyostoma
Cryptobranchus
Oesophagus
Rectum
Duodenum
Intestine
Anura
Apoda
Urodela
Caudata
Frogs
Salamander
Ichthyophis
Necturus
Oviparous
Eggs non-mosaic
fertilisation external
Cleavage-meroblastic
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
Frog
Necturus
Toad
Hyla
Elasmobranch ancestors
Amphioxis like ancestors
Crosspterygian ancestors
None of these
ward off their enemies
attract the opposite sex
identify the same species
collect the young ones
Ichthyopsida
Ichthyopsaurus
Ichthyodactyla
Pterodactyla
thick and cornified epithelium
poorly cornified stratified squamous epithelium
a simple columnar epithelium
small microscopic scales in it
Hyla
Uraeotyphlus
Ophisaurus
Discoglossus
Uraeotyphlus
Triturus
Siren
Amphiuma
Cryptobranchus - hell bender
Necturus - mud puppy
Amphiuma - congo cell
Rhacophorous - flying frog
dry
scaly
moist
both (a) and (c)
a single body segment each
a multiple number of body segments each
a single and from multiple segments respectively
none of these
Salamandar
Discoglossus
Necturus
Amphiuma
lizards
rabbits
salmanders
crocodiles
Amphiuma
Ichthyophis
Salamander
Necturus
Anura
Apoda
Gymnophiona
Urodela
have two auricles and one ventricle
have smooth moist skin
have a cloaca
respire by lungs in adult stage
more terrestrial
more aquatic
more aerial
none of these
Salmander
Cryptobranchus
Necturus
Bufo