Why can a person not swallow food and talk at the same time?
a. the brain cannot control two activities at the same time.
b. in order to speak, air must come through the pharynx to form sounds.
c. in order to swallow, the epiglottis must close off the larynx (trachea).
d. both b and c are correct.

What makes the results of a scientific experiment accurate? a) having multiple trials b) lacking any supporting data c) working in a lab d) using a hypothesis that is always true

During which phase does earth see more than half of the moon's surface? 1)first quarter2)third quarter3)waxing gibbous4)waning crescent

This class has taught you that the use of science and medicine in practical ways has become an international endeavor. one of the greatest examples of an international science accomplishment is which allows the profiling of human dna, useful not only to science but also medicine. a) forensic science b) the fbi c) the human genome project d) bioterrorism