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Some common characteristics unique to placental mammals are:
1. The young are nourished in a placenta before birth.
2. There are no epipubic bones.
3. Different openings are used for urination and defecation.
4. There is a malleolus (bony extension) at the bottom of the tibia.
5. The back bones of the foot fit into a hole fored by the bottom of the tibia and fibula.
6. The back of the first metatarsal bone is further back than the back of the second metatarsal bone.
7. A corpus callosum is present in the brain.
Wiki User
∙ 9y ago
Wiki User
∙ 12y agoOnly mammals use the placenta during gestation. The frank answer to your question is in your question. The placenta is the only differentiating characteristic between placental mammals and marsupial mammals.
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What are examples of placental animals?
Most mammals are placental...marsupial mammals and monotremes are not placental.
One characteristic of placental mammals?
The young are nourished in the womb by the placenta.
Are horses placental animals?
Yes.
What group includes marsupials monotremes and placental animals?
Marsupials, monotremes and placental animals are members of the group known as mammals, or Mammalia.
What makes placental different from other animals?
Placental animals give birth to live young that have been nourished in the womb by the placenta.
Are kangaroos placental animals?
No. Kangaroos are marsupials.
Are zebra's placental mammals?
yes all mammals are placental. No, not all animals are placentals. There are also marsupials and monotremes.
What is a main characteristic of a Monotreme?
The main characteristic of a monotreme is that it is an egg-laying mammal, unlike marsupials and placental mammals which give birth to live young.
WHere do placental animals live?
All placental animals are mammals. Placental mammals are the most successful of the major mammal groups (the other two being the marsupials and the monotremes). Everything from rodents to dogs to cows and even elephants, even you, are placental mammals. In fact, they are found on every continent and in virtually every habitat on Earth.
What mammals have bellybuttons?
All placental animals have belly buttons.
Are squirrels marsupials or placental animals?
Squirrels are placental mammals. There is a kind of marsupial called a "squirrel glider," but that's not the same thing as a squirrel.
Are animals stubborn characteristic?
no
