Obviously, the same problem extends into all other aspects of lodging with companion(s). Just as common is traveler's diarrhea, because it disrupts stools and leads to the inevitable constipation; Cause-and-effect: Most people believe traveler's diarrhea is caused by contaminated food or water.
variation in a characteristic that is a result of genetic inheritance from the parents is called inherited variation children usually look a little like their father and a little like their mother but they will not be identical to either of their parents
Antigenic variation refers to the mechanism by which an infectious agent such as a protozoan, bacterium or virus alters its surface proteins in order to evade a host immune response. It is related to phase variation.ntigenic variation is the expression of various alternative forms of antigen on the cell surface. Whereas phase variation is the phenotypic switch that is usually reversible and is referred to as an ON-OFF switch.