Oviparous
Eggs non-mosaic
fertilisation external
Cleavage-meroblastic
D. Cleavage-meroblastic
tympanic membrane and tympanic cavity
middle ear ossicle
eustachian tube
all of these
Frogs
Salamander
Ichthyophis
Necturus
nucleated and round
enucleated and oval
enucleated and round
nucleated and oval
Anura
Apoda
Urodela
Caudata
have two auricles and one ventricle
have smooth moist skin
have a cloaca
respire by lungs in adult stage
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
skull of frog
vertebrae of frog
sternum of frog
pelvis of frog
development of sturdy eggs
change over to herbivorous feeding
occurence of metamoophosis on amphibia
evolution of terrestrial habit
Gill slits in adults
Long vertebral column
Tail in adults
Teeth in both the jaws
Frog
Necturus
Toad
Hyla
Ichthyophis
Sharks
Rays
Cuttlefish
Ichthyopsida
Ichthyopsaurus
Ichthyodactyla
Pterodactyla
Hyla
Uraeotyphlus
Ophisaurus
Discoglossus
Cryptobranchus - hell blender
Necturus - mud puppy
Uraeotyphlus - blind worm
Alytes - midwife toad
lizards
rabbits
salmanders
crocodiles
Hyla
Bufo
Necturus
Ophisaurus
Oesophagus
Rectum
Duodenum
Intestine
a single body segment each
a multiple number of body segments each
a single and from multiple segments respectively
none of these
blood circulation in the body.
venous system
arterial system
all of these
Ram tigrina
Hyla
Rhacophorus
Amphiuma
Elasmobranch ancestors
Amphioxis like ancestors
Crosspterygian ancestors
None of these
pronephric kidney
mesonephric kidney
metanephric kidney
both (a) and (b) ,
Uraeotyphlus
Triturus
Siren
Amphiuma
neoteny
paedogensis
paedomorphosis
none of these
more terrestrial
more aquatic
more aerial
none of these
thick and cornified epithelium
poorly cornified stratified squamous epithelium
a simple columnar epithelium
small microscopic scales in it
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
Sparrow
Hyla
Mouse
Bufo
dry
scaly
moist
both (a) and (c)
Salamandar
Discoglossus
Necturus
Amphiuma