mammals with a single nostril
mammals with a single gill slit
mammals with a single cloacal aperture
mammals with a single mouth
C. mammals with a single cloacal aperture
eutherian mammals only
eutherians and prototherians
metatherians and prototherians
metatherians and eutherians
store water
loose water
uses metabolic water
conserve water through kidneys
flying lizard
flying fish
bat
none of these
Pig
Camel
Cow
Goat
hairs only
hairs and claws
hairs, claws and horns
hairs, horns and hooves
rabbit
sloth
pika
porcupine
sound
tail
external ear
fore limbs
gnu
mustang
ibex
puma
produce ultrasonic sound
produce infrasonic sound
have powerful nocturnal eyes
have powerful wings
sea cows, sea lions and walrus
horses, zebras, and tapirs
whales, dolphins and porpoises
goat, sheep and bison
lion, tiger, panther, cat
goat, sheep, bison
horse, zebra, donkey, pony
none of these
sweat
milk
wax-like material
oily fluid
deer
whale
donkey
dog
Indian elephant
African elephant
Blue whale
None of these
dinosaur
duck
fossil mammal
monotreme mammal
field rat
snail
jackal
parakeet
Whales
Penguins
Bears
None of these
mammals
birds
reptiles
amphibians
skin with glands
hairy skin
true placentation
locomotary hindlimbs
incisors
canines
premolars
molars
bony fishes
whales
sea lions
sea anemones
dogs and cats
monkeys and apes
cows and sheeps
rats and rabbits
Chiroptera
Rodentia
Insectivora
Edentata
wolf
fox
jackal
hyanea
plantigrade locomotion
digitigrade locomotion
unguligrade locomotion
terrestrial locomotion
Frog
Rabbit
Pigeon
Lizards
presence of thecodont dentition
a four-chambered heart
presence of corpus callosum in brain
presence of diaphragm
man
gorilla
gibbon
chimpanzee
presence of pinna and diaphragm
presence of hair and mammary gland
presence of sweat and sebaceous glands
viviparity and placenta
Artiodactyla
Proboscidea
Sirenia
Perissodactyla