After birth, most young marsupials, known as joeys, develop in the mother's pouch on her abdomen. Within the pouch, the teat swells in the young joey's mouth to help secure it in place. The joey remains in the pouch for up to nine months, depending on the species of marsupial.
There are some exceptions to this: the numbat, for example, has no pouch. The young remain secured in place by the swollen teat in their mouth, clinging to the mother's underbelly.
Marsupials complete their development within a marsupium, which may be a full abdominal pouch, or a rudimentary flap of skin.
Marsupials remain in a pouch on the front of the mother until they are old enough to survive on their own. Other mammals are away from the mother's body immediately after birth.
Seals are placental mammals, as the young complete their development within the mother's uterus, attached to a placenta. They do not have a pouch like most marsupials, and they do not lay eggs like monotremes.
No.
Firstly, all marsupials are mammals. However, not all mammals are marsupials. The jerboa is a mammal, but it is a rodent and not a marsupial.
Dolphins are placental mammals.
A placental mammal has a longer gestation period than a marsupial of similar size. This is because the baby placental mammal completes its development within the womb, unlike the marsupial joey which must complete its development in the pouch.
No. Armadillos are placental mammals.
No. Seals are placental mammals.
No. Although mammals do not go through a complete metamorphosis, as amphibians do, many mammals do not look like their parents at birth. A marsupial at birth is a tiny embryo, not at all like an adult marsupial. Many mammals are born blind and hairless. Probably, the mammals that most resemble their parents at birth are the hoofed mammals.
marsupials and monotremes.
Most mammals are placental...marsupial mammals and monotremes are not placental.
No, horses are equine mammals. They are not marsupials
No. Hyenas are not marsupials. They are placental mammals.