Common characteristics of placental mammals

Answer 1

Placental mammal's method of reproduction is harder on the mothers but better for the infant than in marsupial reproduction. The babies are protected inside the mother for a longer period, allowing for more complex development.

When the newborns emerge, they are generally more adapted for survival than newborn reptiles, birds or amphibians. Newborn giraffes can stand up and walk just seconds after birth.

Related Information:

There is a down side: A longer gestation period is more burdensome for the mother, who must provide increasing levels of nutrients (especially calcium), energy, and dispose of an increasing volume of embryonic waste for the baby, over a longer period of time.

Answer 2

Bear live young, nourish their young with milk from mammary glands, and usually have hair or fur.

Answer 3

It all deepens on what environment they are in.

Answer 4

One characteristic they have is they develop in their mother's body.

Answer 5

Embryos get nourishment and expel waste products. Embryos are protected for a longer period.

Answer 6

eutherians