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 Wilson Reagan (/ËrÉnÉld ËwÉªlsÉn ËreÉªÉ¡Én/; February 6, 1911 â June 5, 2004) was an American politician and actor who served as the 40th President of the United States from 1981 to 1989.