[Solved] The evolution of a genetically based, reciprocal adaptation in two or more interacting species is described as coadaptation . Surgical Incision: A cut made through the skin and tissues during surgery to gain access to the area being operated on. Occult Blood: Refers to the presence of blood in the feces that is not visible to the naked eye, usually detected by chemical tests. Menstrual Cycle: The regular natural change that occurs in the female reproductive system, marking the preparation for potential pregnancy. Throat Cultures: A test involving the collection of a sample from the back of the throat using a swab to identify bacteria or viruses causing infections such as strep throat.