In the human body, skin cells
a are unable to replace themselves,
b are constantly replacing themselves,
c replace themselves once each year,
d. only replace themselves after serious injury.

Assume you were going to teach this information to a group of seventh graders. pick a title for your presentation that would make the seventh graders want to listen to you.

9. withdrawal occurs when alcohol is removed from the system after the brain a. adapted to the continued presence of alcohol b. become physically saturated with alcohol c. become impervious to the effects of alcohol d. begun to treat alcohol as a poison

What disease is characterized by the unrestricted growth of abnormal cells on or in the tissues of the body? a) protozoan infection. b) cancer c) diabetes. d) coronary heart disease