Horizontal gene transfer also plays a role in the spread of virulence factors, such as exotoxins and exoenzymes, amongst bacteria. A prime example concerning the spread of exotoxins is the adaptive evolution of Shiga toxins in E. coli through horizontal gene transfer via transduction with Shigella species of bacteria.
The brothers grew up on a succession of Oklahoma and Kansas homesteads during... On this day in 1911, President Ronald Wilson Reagan is born in Tampico, Illinois. Ronald Reagan, the 40th president of the United States, served for two terms from 1981 to 1989.
Ronald Reagan, originally an American actor and politician, became the 40th President of the United States serving from 1981 to 1989. His term saw a restoration of prosperity at home, with the goal of achieving peace through strength abroad.n 1966 he was elected Governor of California by a margin of a million votes; he was re-elected in 1970. Ronald Reagan won the Republican Presidential nomination in 1980 and chose as his running mate former Texas Congressman and United Nations Ambassador George Bush.