Final answer:
A physician who performs biopsies and procedures in the study of disease is a pathologist. Pathologists are medical doctors or veterinarians who specialize in the laboratory detection of disease in animals, including humans.
Step-by-step explanation:
A physician who performs biopsies and procedures in the study of disease is a pathologist. Pathologists are medical doctors or veterinarians who specialize in the laboratory detection of disease in animals, including humans. They examine tissue specimens through a microscope to identify cancers and other diseases and may also perform autopsies to determine the cause of death.