Yes it is
Yes, a Velvet Monkey is a primate and a placental mammal.
Yes, monkeys are placental mammals.
No, they are primates.
Yes, every species of monkey in the world is classified as a primate. Humans are also considered primates.
A mammal that is not a monotreme nor marsupial. It could be a monkey, a dog or cat, any mammal really.
No, and they are not related in any way. Sugar gliders are marsupials, of the possum family (which are not the same as opossums). Monkeys are placental mammals, and primates.
A rabbit is a placental mammal.
No. There are no insects which are placental.
The aardvark is a placental mammal.
Most mammals are placental...marsupial mammals and monotremes are not placental.
A cow is a placental mammal.
No,octopus are not placental, they are cephalopad.