Final answer:
Primates are divided into the suborders Prosimii and Haplorhini, the latter of which is also known as Anthropoids and includes monkeys, apes, and humans. The study of primates is crucial for understanding human evolution.
Step-by-step explanation:
Primates can be placed into two suborders, the Prosimii and the Haplorhini, also known as Anthropoids. Prosimians include species like bush babies, lemurs, and lorises. Anthropoids consist of monkeys, lesser apes, great apes, and humans. Anthropoids usually possess larger brains and are more likely to be diurnal compared to the more primitive, nocturnal Prosimians. The Haplorhini suborder is further categorized into Tarsiiformes, which consists of tarsiers, and Simiiformes, which include Platyrrhini (New World monkeys) and Catarrhini (Old World monkeys, apes, and humans). The evolution and characteristics of primates are significant as they help us understand the development of our species, Homo sapiens, which is placed within the hominid family, comprising chimpanzees, gorillas, orangutans, and humans.
The complete question is:
Some researchers prefer a traditional (Gradistic) classification that divides the primates into two suborders: Prosimii and Anthropoidea. Under this system, which primates are classified as prosimians?
a. lemurs, lorises and tarsiers
b. only lemurs and lories
c. only Old World monkeys
d. only nocturnal primates
e. none of the above