bill
pecten
keel
filoplume
two occipital condyles
one occipital condyle
many occipital condyles
any of these
peacock
emu
penguin
ostrich
Tail only
Wings only
both and
beneath the contour feathers.
csursorial
perching
wading
raptorial
day light effecting the endocrine glands
search for food
search for shelter
purpose of breeding
fly for long distance
protect against ectoparasites
exhibit secondary sexual dimorphism
keep the body warm
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
Ostrich
Emu
Archaeopteryx
Pelican
Quill
Filoplume
Down feather
All of these
Bernhard Katz
Alick Isacs
Charles Darwin
Andreas Wagner
a mammal
a reptile
abrid
none of these
synsacrum
sternum
pygostyle
thoracic mass
instinct
instinct and intuition
instinct and intelligence
both and
Crow
Koel
Peacock
Ostrich
Dr. Salim Ali
Dr.MS.Mani
Dr.J.C.Bose
Dr. Jogendra
heterocoelous
acoelous
opisthocoelous
amphicoelous
Ostrich
Penguin
Emu
Albatros
swan
falcon
penguin
eagle
larynx
syrinx
synsacrum
pygostyle
Parrot
Owl
Pigeon
Sunbird
perching type
wading type
raptorial type
running type
faecal matter
nitrogenous wastes
excess salt
both and
finch
humming bird
weaver bird
shrew
middle of the trachea
at the base of trachea where it divides into bronchi
base of tongue
none of these
a flightless bird
first digit of hindlimb
a type of corn
none of these
syrinx
larynx
synsacrum
synzygy
New Zealand
India
Japan
Australia
Kiwi
Ostrich
Penguin
All of these