Fossil and living apes exhibit a distinctive Y-5 pattern on the chewing surfaces of their molar teeth.

Question

Quizplus · Accepted Answer

This is true. The Y-5 pattern refers to the shape of the cusps on the molars, which form a Y-shaped groove with five cusps around it. This pattern is unique to apes and is a key diagnostic feature used to identify them in the fossil record. It is also found in living apes, including chimpanzees, gorillas, and orangutans.

Fossil and Living Apes Exhibit a Distinctive Y-5 Pattern on the Chewing