Relationships within a species that are mutually or reciprocally beneficial are called mutualisms. Type A and C genes are reciprocally antagonistic. Combination with sulfonylureas or insulin reciprocally exponentiate risk of hypoglycemia. Whether the two subfamilies are reciprocally monophyletic is an open question. These equations are applied when phenomena are assumed to be reciprocally causal. Reproduction is by outcrossing, with worms mating reciprocally. Reciprocally, accumulating evidence suggest that metabolic alterations may affect the epigenome. The "E. coli" chromosome structure and gene expression appear to influence each other reciprocally. It is reciprocally proportional to the square root of the ion concentration "C". It is suggested these multiple relationships influence one another reciprocally, at least within a family. In a slightly more complex form a sender and a receiver are linked reciprocally. Every recognised qualification of each admission board is reciprocally recognised. Reaching a reciprocally defined understanding is communication's basic function. Acting reciprocally with Greece, Turkey made systematic attempts to evacuate the Greeks on the isle. Each of the countries reciprocally awarded medals to the U.S. Unknown Soldier.