No. Placental means a type of mammal, and mammals are vertebrates, meaning they have a backbone and an entire internal skeletal structure. Insects do not have a backbone, and are therefore invertebrates.
No. There are no insects which are placental.
A rabbit is a placental mammal.
The aardvark is a placental mammal.
A cow is a placental mammal.
Most mammals are placental...marsupial mammals and monotremes are not placental.
Terrestrial placental mammals do have fur or hair. Marine placental mammals do not.
No,octopus are not placental, they are cephalopad.
a jaguar is a placental
Yes, vicuna are placental.
Placental.
No. Primates are a group of placental mammals, but there are many placental mammals that are not primates.
Yes. A mouse is a placental mammal.