What mammal group do koalas and kangaroos belong to?

Answer 1

Koalas and Kangaroos both belong to the mammal group known as marsupials. These animals are commonly known as the "pouched mammals", though a few species do not have full abdominal pouches. However, these animals are all characterised by giving birth to undeveloped young which cannot survive independently of the mother. In order to survive, they must latch onto a teat, which swells in their mouth, securing them in place: some are then protected by a pouch, others by a flap of skin, and others just by the mother's underbelly.
Within the classification of marsupials, koalas and kangaroos belong specifically to the order of Diprotodontia. This word is from the Greek words 'protos' and 'odontos', meaning 'two front teeth' and it refers to the prominent large pair of incisors on the lower jaw. This order also includes common marsupials such as the wombat, wallaby, sugar glider and possum of Australia (different from the opossum).

Answer 2

Koalas and kangaroos are both marsupials - pouched mammals.