Final answer:
No, the human's mandibular premolar is not sectorial like a chimp's. It has a flatter shape with two rounded cusps that are useful for mashing food.
Step-by-step explanation:
No, the human's mandibular premolar is not sectorial like a chimp's. In chimpanzees, the first mandibular premolar is sectorial, which means it is adapted for cutting and shearing food. However, in humans, the mandibular premolar is not sectorial. It has a flatter shape with two rounded cusps that are useful for mashing food.