Final answer:
Prosimians generally have smaller brains and a greater reliance on smell than anthropoids, which have larger brains and a greater reliance on vision.
Step-by-step explanation:
Prosimians differ from anthropoids mostly in the characteristic of brain size and reliance on sensory systems. Prosimians, such as the bush babies of Africa, lemurs of Madagascar, and lorises of Southeast Asia, tend to have relatively smaller brains compared to anthropoids which include monkeys, apes, and humans. Additionally, prosimians are usually nocturnal and have larger olfactory centers in their brains, indicating a stronger reliance on the sense of smell. In contrast, anthropoids typically have larger brains, are more often diurnal, and rely more heavily on vision.