Before the discovery of antibiotics, many people did not live long enough to develop heart disease and died of other causes instead.

Dr. Hampton is a family practitioner who has referred her patient with a blood disorder to Dr. Johns. What type of specialist is Dr. Johns?

A) Radiologist B) Gerontologist C) Hematologist D) Allergist

This system contains a central primary supply pipe that feeds branch distribution lines throughout the jurisdiction

A. Loop, or belt, system B. Grid system C. Tree system