Jaws Appear to Have Evolved from

question 73

Multiple Choice

Jaws appear to have evolved from

• A) the fusion of many bony elements found in the skin of the neck region of jawless ancestors.
• B) a large, bony shield that protruded from between the base of the pectoral fins.
• C) modification of a disk of bones surrounding the mouth in lampreys.
• D) skeletal rods that supported gill slits near the mouth.