Placental.
Elephants are placental mammals.
The platypus is a monotreme mammal.
The aardvark is a placental mammal.
A cow is a placental mammal.
its a fish
The Iberian lynx is a placental mammal. All members of the feline family are placental.
A koala is a marsupial, not a bear, which is a placental mammal.
The koala is a marsupial. Monotremes are egg-laying mammals, and koalas do not lay eggs, but give birth to live young.
No. It is a marsupial (not a bear).
This is the Koala, often incorrectly referred to as a "koala bear". It is a marsupial, not a bear. Bears are placental mammals.
Yes. The dog keeps the young inside the body until the baby can function independently.