bill
pecten
keel
filoplume
C. keel
aerial life
amphibious life
terrestrial life
aquatic life
heterocoelous
acoelous
opisthocoelous
amphicoelous
sharp massive, deeply hooked
stout and acute
chisel sfiaped
long, strong and pointed
perching type
wading type
raptorial type
running type
Bernhard Katz
Alick Isacs
Charles Darwin
Andreas Wagner
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
Tail only
Wings only
both and
beneath the contour feathers.
instinct
instinct and intuition
instinct and intelligence
both and
csursorial
perching
wading
raptorial
faecal matter
nitrogenous wastes
excess salt
both and
calcareous
soft and solid
strong and solid
pneumatic
Pectoralis major
Pectoralis minor
Intrinsic muscle
None of these
larynx
syrinx
synsacrum
pygostyle
ostrich
albatros
penguin
elephant bird
homiothermic condition and viviparity
horny jaws and four-chambered heart
ossified skeleton and four-chambered heart
bipedal locomotion and body covered with feathers
a flightless bird
first digit of hindlimb
a type of corn
none of these
Serpentology
Entomology
Ornithology
Dendrology
two occipital condyles
one occipital condyle
many occipital condyles
any of these
Charles Darwin
Lamarck
Hippocrates
A. Muller
parrot
peacock
kiwi
pigeon
three toes
four toes
five toes
any of these
grain-eating birds
meat-eating birds
fruit-eating birds
insect-eating birds
finch
humming bird
weaver bird
shrew
Dr. Salim Ali
Dr.MS.Mani
Dr.J.C.Bose
Dr. Jogendra
peacock
emu
penguin
ostrich
Ostrich
Penguin
Emu
Albatros
middle of the trachea
at the base of trachea where it divides into bronchi
base of tongue
none of these
a mammal
a reptile
abrid
none of these
New Zealand
India
Japan
Australia
ectoderm
mesoderm
endoderm
skin