heterocoelous
acoelous
opisthocoelous
amphicoelous
a mammal
a reptile
abrid
none of these
sharp massive, deeply hooked
stout and acute
chisel sfiaped
long, strong and pointed
perching type
wading type
raptorial type
running type
calcareous
soft and solid
strong and solid
pneumatic
Bernhard Katz
Alick Isacs
Charles Darwin
Andreas Wagner
middle of the trachea
at the base of trachea where it divides into bronchi
base of tongue
none of these
finch
humming bird
weaver bird
shrew
Quill
Filoplume
Down feather
All of these
sharp eyesight
keen smelling power
both and
sharp eyesight and poor smelling power
csursorial
perching
wading
raptorial
two occipital condyles
one occipital condyle
many occipital condyles
any of these
New Zealand
India
Japan
Australia
syrinx
larynx
synsacrum
synzygy
Parrot
Owl
Pigeon
Sunbird
peacock
emu
penguin
ostrich
larynx
syrinx
synsacrum
pygostyle
fly for long distance
protect against ectoparasites
exhibit secondary sexual dimorphism
keep the body warm
Tail only
Wings only
both and
beneath the contour feathers.
a flightless bird
first digit of hindlimb
a type of corn
none of these
parrot
peacock
kiwi
pigeon
instinct
instinct and intuition
instinct and intelligence
both and
Kiwi
Ostrich
Penguin
All of these
Asia
Africa
America
Antarctica
Charles Darwin
Lamarck
Hippocrates
A. Muller
Ostrich
Penguin
Emu
Albatros
faecal matter
nitrogenous wastes
excess salt
both and
grain-eating birds
meat-eating birds
fruit-eating birds
insect-eating birds
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
ostrich
albatros
penguin
elephant bird