two occipital condyles
one occipital condyle
many occipital condyles
any of these
B. one occipital condyle
bill
pecten
keel
filoplume
synsacrum
sternum
pygostyle
thoracic mass
Kiwi
Ostrich
Penguin
All of these
Heart is four-chambered consisting of the auricles and two ventricles
Hind-limbs are modified as wings
Mouth is replaced by beak
Aves are warm blooded
crow, sun-bird, flower pecker
myna, peacock, parrot
weaver bird, sun-bird, flower pecker
all of these
mammals
reptiles
aves
lizards
heterocoelous
acoelous
opisthocoelous
amphicoelous
Crow
Koel
Peacock
Ostrich
Bernhard Katz
Alick Isacs
Charles Darwin
Andreas Wagner
peacock
emu
penguin
ostrich
a mammal
a reptile
abrid
none of these
homiothermic condition and viviparity
horny jaws and four-chambered heart
ossified skeleton and four-chambered heart
bipedal locomotion and body covered with feathers
sharp eyesight
keen smelling power
both and
sharp eyesight and poor smelling power
a type of air sacs related to ventilation
a fork shaped structure fused and formed by clavicles
a strucutre present in trachea for producing sound
none of these
fly for long distance
protect against ectoparasites
exhibit secondary sexual dimorphism
keep the body warm
a flightless bird
first digit of hindlimb
a type of corn
none of these
Ostrich
Penguin
Emu
Albatros
two occipital condyles
one occipital condyle
many occipital condyles
any of these
Ostrich
Emu
Archaeopteryx
Pelican
swan
falcon
penguin
eagle
Tail only
Wings only
both and
beneath the contour feathers.
amphi-coelous
hetero-coelous
gastro-coelous
platy-coelous
ectoderm
mesoderm
endoderm
skin
Asia
Africa
America
Antarctica
three toes
four toes
five toes
any of these
csursorial
perching
wading
raptorial
Charles Darwin
Lamarck
Hippocrates
A. Muller
Albatros
Hummingbird
Elephant bird
Penguin
calcareous
soft and solid
strong and solid
pneumatic
finch
humming bird
weaver bird
shrew