This report describes the typical weather at the Logan International Airport (Boston, Massachusetts, United States) weather station over the course of an average February. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Medical Definition of miscegenation. : a mixture of races; especially : marriage or cohabitation between a white person and a member of another race.
In molecular biology, transformation is the genetic alteration of a cell resulting from the direct uptake and incorporation of exogenous genetic material (exogenous DNA) from its surroundings and taken up through the cell membrane(s).ransformation occurs naturally in some species of bacteria, but it can also be effected by artificial means in other cells. For transformation to happen, bacteria must be in a state of competence, which might occur as a time-limited response to environmental conditions such as starvation and cell density.