Wich of the following is an example of mechanical digestion?

a. the teeth chew food into smaller pieces
b. saliva break down sugar molecules in the mouth
c. bile released from the gallbladder breaks down fat molecules
d. acids in the stomach break down food molecules and create chyme

If scientists are trying to use what they know about hsv to devise a means of protecting other people from being infected, which of the following would have the best chance of lowering the number of new cases of infection? a) vaccinate of all persons with preexisting cases of hsvb) interfere with new viral replication in preexisting cases of hsvc) treat hsv lesions to shorten the breakoutd) educate people about avoiding sources of infection