Marsupials and monotremes are mammals. These creatures all feed their young on mothers' milk.
If the question means what is the difference between placental mammals (eutherians) and marsupials and monotremes, that is another matter. The essential difference between all of the groups is that placentals nurture their developing young via the placenta inside the female's body.
Most marsupials (not all) have a pouch, or marsupium, low down on their abdomen into which the newborn, undeveloped joey crawls after birth to continue its development. Monotremes, on the other hand, are egg-laying mammals.
A wallaroo is a marsupial.
The platypus is a monotreme mammal.
No, they are a marsupial and not a monotreme. There are only 2 members in the monotreme category which are the echidna and the platypus.
Placental.
Elephants are placental mammals.
A wallaby is a marsupial. The only monotremes, or egg-laying mammals, are the platypus and the echidna.
No. A possum is a marsupial. The only monotremes are the platypus and the echidna.
its a fish
No. An opossum is a marsupial. There are just three species of monotreme: the platypus, the short-beaked echidna and the long-beaked echidna.
The koala is a marsupial. Monotremes are egg-laying mammals, and koalas do not lay eggs, but give birth to live young.
The aardvark is a placental mammal.
A cow is a placental mammal.