1. The philtrum of the lip is formed when these two structures fuse:

a. Left and right medial nasal process
b. Left and right lateral nasal process
c. Left and right frontonasal prominence
d. Medial and lateral nasal process
e. Don't know

2. Most cleft lips occur when these two structures fail to fuse:

a. Medial and lateral nasal process
b. Lateral nasal process and maxillary prominence
c. Medial nasal process and maxillary prominence
d. Frontonasal prominence and lateral nasal process
e. Don't know

3. Which statement is TRUE about the development of the palate?

a. The primary palate is formed from the fusion of the left and right palatine shelves
b. The secondary palate is formed from the fusion of the left and right palatine bones
c. The incisive foramen represents the anatomic boundary between primary and secondary palate
d. A cleft palate typically occurs if the primary and secondary palates don't fuse
e. Don't know

4. What structures form the uvula?

a. Palatine bones
b. Palatine shelves
c. Intermaxillary segments
d. Palatine arches
e. Don't know

5. Which pharyngeal arch is responsible for upper and lower jaw development?

a. Arch 1
b. Arch 2
c. Arch 3
d. Arch 4
e. Don't know