fly for long distance
protect against ectoparasites
exhibit secondary sexual dimorphism
keep the body warm
D. keep the body warm
swan
falcon
penguin
eagle
grain-eating birds
meat-eating birds
fruit-eating birds
insect-eating birds
heterocoelous
acoelous
opisthocoelous
amphicoelous
larynx
syrinx
synsacrum
pygostyle
faecal matter
nitrogenous wastes
excess salt
both and
calcareous
soft and solid
strong and solid
pneumatic
Charles Darwin
Lamarck
Hippocrates
A. Muller
a mammal
a reptile
abrid
none of these
three toes
four toes
five toes
any of these
Crow
Koel
Peacock
Ostrich
peacock
emu
penguin
ostrich
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
Kiwi
Ostrich
Penguin
All of these
a flightless bird
first digit of hindlimb
a type of corn
none of these
aerial life
amphibious life
terrestrial life
aquatic life
parrot
peacock
kiwi
pigeon
syrinx
larynx
synsacrum
synzygy
ectoderm
mesoderm
endoderm
skin
crow, sun-bird, flower pecker
myna, peacock, parrot
weaver bird, sun-bird, flower pecker
all of these
two occipital condyles
one occipital condyle
many occipital condyles
any of these
Ostrich
Penguin
Emu
Albatros
Albatros
Hummingbird
Elephant bird
Penguin
bill
pecten
keel
filoplume
sharp massive, deeply hooked
stout and acute
chisel sfiaped
long, strong and pointed
ostrich
albatros
penguin
elephant bird
Parrot
Owl
Pigeon
Sunbird
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
Quill
Filoplume
Down feather
All of these
sharp eyesight
keen smelling power
both and
sharp eyesight and poor smelling power
Dr. Salim Ali
Dr.MS.Mani
Dr.J.C.Bose
Dr. Jogendra