5. A main difference between chimpanzees and bonobos is that __________.
A) chimpanzees are more social than bonobos
B) chimpanzees are more bipedal than bonobos
C) bonobos use sexual interactions to prevent conflict
D) bonobos are genetically much closer to humans than chimpanzees
6. Current paleoanthropological evidence indicates that the human ancestral line diverged from that of the living
great apes __________ million years ago.
A) 1–2
B) 2–3
C) 4–8
D) 8–15
7. An example of nonhuman primate culture is __________.
A) sign language when the group decides to migrate
B) female chimpanzees wearing leaves around their waist
C) certain forms of greeting such as the raised hand clasp
D) making musical sounds
8. The earliest known primitive hominin is __________.
A) Sahelanthropus tchadensis
B) Orrorin tugenensis
C) Homo floresiensis
D) Australopithecus afarensis