Derived characteristics that define the order Primate includ

Derived characteristics that define the order Primate include
   a. highly developed olfaction (sense of smell).
   b. increased dependence on complex behavior, learning, and behavioral flexibility.
   c. specialized molars, up to six incisors, and a lack of premolars.
   d. bipedalism.

Solution

In animal order primate including lemurs,tarsiers,monkeys,apes and human beings. So all these animals have complex beahvior,learning and beahvioral felxibility which is common feature in all.Primates have limb structure, one upper limb bone, two lower limb bones, many mammalian orders have lost various bones, especially fusing of the two lower limb bones.primates have the internal regulation of body temperature and feeding their young with milk produced by mammary glands.