A young patient presents with a small invagination of the skin on the anterolateral neck, just below the jaw. The CT scan of this patient indicates a cervical (pharyngeal) cyst connected to it. What term describes the invagination?
A. Ectopic thymus
B. External Branchial Fistula
C. Internal Branchial Fistula
D. Pharyngeal Cleft
E. Pharyngeal Pouch
Answer: B. External Branchial Fistula
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True or False: To allow passage of the infant during child birth, the cervix widens and lengthens
A. true B. false
Characters that provide evidence for evolutionary relationships based on shared ancestry are called ____
a. homologous b. analogous c. taxonomic d. convergent e. exaptations
By using fossil evidence, paleontologists have concluded that most species exist from years before becoming extinct.
A. 100 to 1,000 B. 1 million to 10 million C. 10,000 to 100,000 D. 1,000 to 10,000 E. 100,000 to 1 million
The most recent level of evolution in primates is considered to be in
a. brain expansion. b. behavior and culture. c. dentition. d. hand grip. e. daytime vision.