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 (1911-2004), a former actor and California governor, served as the 40th U.S. president from 1981 to 1989. Raised in small-town Illinois, he became a Hollywood actor in his 20s and later served as the Republican governor of California from 1967 to 1975.Dubbed the Great Communicator, the affable Reagan became a popular two-term president.n his younger years, Ronald Reagan was a member of the Democratic Party and campaigned for Democratic candidates; however, his views grew more conservative over time, and in the early 1960s he officially became a Republican.