Pectoralis major
Pectoralis minor
Intrinsic muscle
None of these
A. Pectoralis major
swan
falcon
penguin
eagle
instinct
instinct and intuition
instinct and intelligence
both and
New Zealand
India
Japan
Australia
peacock
emu
penguin
ostrich
larynx
syrinx
synsacrum
pygostyle
bill
pecten
keel
filoplume
grain-eating birds
meat-eating birds
fruit-eating birds
insect-eating birds
three toes
four toes
five toes
any of these
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
Pectoralis major
Pectoralis minor
Intrinsic muscle
None of these
aerial life
amphibious life
terrestrial life
aquatic life
Pavo cristatus
Gallus gallus
Columbia livia
None of these
Ostrich
Penguin
Emu
Albatros
mammals
reptiles
aves
lizards
Bernhard Katz
Alick Isacs
Charles Darwin
Andreas Wagner
csursorial
perching
wading
raptorial
parrot
peacock
kiwi
pigeon
amphi-coelous
hetero-coelous
gastro-coelous
platy-coelous
Quill
Filoplume
Down feather
All of these
finch
humming bird
weaver bird
shrew
sharp massive, deeply hooked
stout and acute
chisel sfiaped
long, strong and pointed
calcareous
soft and solid
strong and solid
pneumatic
homiothermic condition and viviparity
horny jaws and four-chambered heart
ossified skeleton and four-chambered heart
bipedal locomotion and body covered with feathers
Kiwi
Ostrich
Penguin
All of these
perching type
wading type
raptorial type
running type
Ostrich
Emu
Archaeopteryx
Pelican
Albatros
Hummingbird
Elephant bird
Penguin
Asia
Africa
America
Antarctica
Tail only
Wings only
both and
beneath the contour feathers.