sound
tail
external ear
fore limbs
B. tail
store water
loose water
uses metabolic water
conserve water through kidneys
molars
premolars
incisors
canines
skin with glands
hairy skin
true placentation
locomotary hindlimbs
Rodentia
Insectivora
Sivenia
Shiroptera
echidna
shrew
dolphin
kangaroo
presence of thecodont dentition
a four-chambered heart
presence of corpus callosum in brain
presence of diaphragm
sea cows, sea lions and walrus
horses, zebras, and tapirs
whales, dolphins and porpoises
goat, sheep and bison
herd
colony
harem
flock
Lemuroidea
Anthropoidea
Primates
Any of these
mammals with a single nostril
mammals with a single gill slit
mammals with a single cloacal aperture
mammals with a single mouth
Chiroptera
Rodentia
Insectivora
Edentata
Fissipeda
Primates
Carnivora
None of these
sweat
milk
wax-like material
oily fluid
eutherian mammals only
eutherians and prototherians
metatherians and prototherians
metatherians and eutherians
Artiodactyla
Proboscidea
Sirenia
Perissodactyla
dinosaur
duck
fossil mammal
monotreme mammal
Frog
Rabbit
Pigeon
Lizards
gnu
mustang
ibex
puma
Proboscida
Sirenia
Cetacea
None of these
flying lizard
flying fish
bat
none of these
hedgehog
porcupine
shrew
none of these
a four-chambered heart
a pair of testis
a pair of lungs
a diaphragm between thorax and abdomen
deer
whale
donkey
dog
produce ultrasonic sound
produce infrasonic sound
have powerful nocturnal eyes
have powerful wings
incisors
canines
premolars
molars
Cetacea
Chiroptera
Rodentia
Primata
Proboscida
Ruminants
Perissodactyla
Artiodactyla
eutherians
protherians
metatherians
marsupials
hairs only
hairs and claws
hairs, claws and horns
hairs, horns and hooves
Dolphins
Oractologus cuniculus
Homosapiens fassilis
Homosapiens sapiens