Animals: Classifications 动物：分类
 
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1 : Mammals are a type of ________, which means they have a backbone.
invertebrate
human
vertebrate
carnivore
 An X-ray of a backbone
 
2 : The Australian platypus is a mammal, even though it lays eggs. When people first saw them, they thought they were birds or ________ because of this.
arachnids
reptiles
griffins
dragons
 A platypus
 
3 : Kangaroos are a type of ________. They are mammals and carry their young in a pouch.
rodent
feline
canine
marsupial
 A kangaroo
 
4 : The dodo is probably the best-known ________ animal. It was a flightless bird from Mauritius.
extinct
extinguished
prehistoric
dinosaur
 A drawing of a dodo
 
5 : Humans, monkeys and apes are all ________ characterised by large brains, developed hands and feet and forward-facing eyes.
primates
gorillas
humanoids
quadrupeds
 A monkey
 
6 : Frogs and toads are __________. They can live on land and in water and are cold-blooded and have four legs.
creepy crawlies
newts
amphibians
lizards
 A toad