I tried to do them on my own and failed horribly this is not my major but I need to pass!! Plz help I never ask this many questions!!

3. When a child loses the primary first molar, which tooth takes its place?
A. Permanent first molar
B. Permanent canine
C. Permanent first premolar
D. Permanent second premolar
Student Answer: A
Answer: Incorrect
Reference:

4. This anterior tooth has a single root and sharp incisal edges. It has mamelons upon eruptions. This tooth is a
A. mandibular central incisor.
B. mandibular canine.
C. maxillary lateral incisor.
D. maxillary central incisor.
Student Answer: B
Answer: Incorrect
Reference:

7. The _______ gland is also known as the mixed gland.
A. parotid
B. submandibular
C. minor salivary
D. sublingual
Student Answer: C
Answer: Incorrect
Reference:

9. Premature loss of the _______ can cause arch disharmony.
A. primary first molar
B. primary cuspid
C. primary second molar
D. primary lateral incisor
Student Answer: A
Answer: Incorrect
Reference:

11. You're charting a patient's oral cavity when suddenly a stream of saliva shoots up from the floor of the mouth near the anterior teeth. The saliva is secreted by
A. sublingual glands.
B. the tongue.
C. submandibular glands.
D. ductless glands.
Student Answer: B
Answer: Incorrect
Reference:

13. This tooth has two roots and five cusps. This tooth is a
A. mandibular first molar.
B. mandibular second premolar.
C. maxillary first molar.
D. mandibular second molar.
Student Answer: D
Answer: Incorrect
Reference:

14. The _______ is located in the lower dental arch, between the two lower central incisors.
A. maxillary lateral frenum
B. mandibular lateral frenum
C. mandibular labial frenum
D. maxillary labial frenum
Student Answer: D
Answer: Incorrect
Reference:

16. In the periodontal ligament, the _______ fibers are the most numerous and make up the bulk of all fibers.
A. oblique
B. alveolar crest
C. horizontal
D. apical
Student Answer: B
Answer: Incorrect
Reference:

17. The _______ is the area of a tooth from the cervix to the apex.
A. anatomical root
B. anatomical crown
C. cementoenamel junction
D. mandible
Student Answer: D
Answer: Incorrect
Reference:

18. The section of the tooth where the anatomical crown meets the anatomical root is called the
A. oral cavity.
B. clinical crown.
C. cervix.
D. apex.
Student Answer: A
Answer: Incorrect
Reference:

20. The opening of the _______ is located in the buccal mucosa, just opposite the maxillary second molar.
A. parotid gland
B. Stensen's duct
C. salivary duct
D. sublingual gland
Student Answer: C
Answer: Incorrect
Reference: