In contrast to mammalian jaws, which move up and down, the
Chapter 33, Problem 33.14(choose chapter or problem)
In contrast to mammalian jaws, which move up and down, the mouthparts of arthropods move side to side. Explain this feature of arthropods in terms of the origin of their mouthparts.
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer