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 summary: Ronald Reagan was the 40th president of the United States. He was born in Illinois in 1911. He attended Eureka College on an athletic scholarship, and received a job as a sports announcer for a radio station in Iowa. Reagan joined Warner Brothers Studios in 1937 under a seven year contract.eagan knew that the Cold War was over when Gorbachev came to Washington. Gorbachev was a media celebrity in the United States, and the crowds cheered when he jumped out of his limousine and shook hands with people on the street.