Stacy is training for a marathon so to prepare, she adds distance and intensity to her training runs. What principle is at work in this situation?

Witch system has the main function of the body defense

List things you can lose your license for if you are under 21

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