Machines require some work that is not useful because of friction.

true
false

The cardiovascular system, which transports blood through the body, is a one-way system. select the best answer from the choices provided. t f

Describe two habits that can you move toward achieving your goals.

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