Prosimians
They are New World monkeys, Old World monkeys and apes, and prosimians, the most primitive primates
A primate is a member of the most developed and intelligent group of mammals, including humans, monkeys and apes. The second interpretation of primate is religious. A Priest with the highest position in his country
No. marsupials are not considered primitive. They just have a different method of reproduction.
Most primative form of mass communication: Shouting; before speech in primates, loud sounds that the group associated with danger.
It depends on what you mean by "primitive." The strepsirrhine primates and tarsiers have many traits that are ancestral for primates. However, strepsirrhines have more of these traits. Their group includes the lorises (and relatives) and the lemurs (including the Aye-aye).
They were considered to be one of the most innovative cultures of their time.
brain stem is the oldest and most primitive
Since we are considered primates as well, there are at least 7 billion.
The monkey is a primate. As are apes, marsupials, baboons and such. We, (humans), are even partly in that group. We are bipedal primates. We are considered 'human primates' and they are considered 'non-human primates'.
Porifera (sponges) is considered one of the most primitive phyla because they lack true tissues and organs, and exhibit a simple body plan without symmetry.
Jellyfishes...
Tarsiers are generally considered to be most closely related to anthropoid primates (monkeys, apes, and humans). However, they also share a lot of traits with strepsirrhine primates (lemurs and lorises).