Placentalia ("Placentals") is one of the three extant subdivisions of the class of
animals Mammalia; the other two are Monotremata and Marsupialia. The
placentals are primarily distinguish...
Placental mammals are a rather diverse group, with nearly 4000 described
species, mostly rodents and bats (photos at left). The placental mammals include
Feb 8, 2013 ... Placental mammal (infraclass Eutheria), any member of the mammalian group
characterized by the presence of a placenta, which facilitates ...
Placental mammals (subclass Eutheria) are advanced mammals whose young
are born at a relatively advanced stage (more advanced than the young of other ...
The placental mammals are a very diverse group with an enormous range of
body forms and complex social interactions. The 3782 species are divided
Placental mammals are a specialized type of mammal. In this lesson, we'll learn
about some of the characteristics of placental mammals and go over...
Although marsupials and placental animals are both mammals, there are several
distinguishing features that differentiate the two groups. Placentals include ...
Feb 7, 2013 ... Family resemblance. The ancestor to all placental mammals was a tiny insect-
eating creature that evolved soon after the mass extinctions that ...
Feb 24, 2012 ... Describes how reproduction takes place in placental mammals.
mammals having a placenta; all mammals except monotremes and marsupials.