During fetal development, the ____ is located between the pulmonary trunk and the aorta. 

When a developmental anomaly occurs in which the enamel invaginates within the body of the tooth, it is called "mesiodens."

Indicate whether the statement is true or false

When setting up an office tickler file, you should 

A. include the current calendar year on the file labels. B. put the months in alphabetical order. C. check the tickler file at least once a month. D. place the folders with the current month on top in a prominent place.