Q: Is jaw any opposable articulated structure at the entrance of the mouth? ¶
A: Yes, and typically used for grasping and manipulating food.
Q: Is jaw derived from the most anterior two pharyngeal arches supporting the gills? ¶
A: Yes, and usually bears numerous teeth.
Q: Are jaws bony or cartilaginous and oppose vertically? ¶
A: Yes, and comprising an upper jaw and a lower jaw.
Q: Were jaws used in the buccal pump that pumps water across the gills of fish or air into the lungs in the case of amphibians? ¶
Q: Are jaws also broadly applied to the whole of the structures constituting the vault of the mouth and serving to open and close it and is part of the body plan of most animals? ¶
Q: Are jaws made up of the mandible and the maxilla? ¶
A: Yes, In the ape there is a reinforcement to the lower jaw bone called the simian shelf.
Q: Are jaws often composed of numerous mouthparts? ¶
Q: Are jaws chitinous and oppose laterally? ¶
A: Yes, and may consist of mandibles or chelicerae.