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.
Cristiano Ronaldo Biography. Cristiano Ronaldo has gone from a small island in the middle of the ocean to the top of the soccer world. Kidzworld checks out one of the world's most exciting soccer superstars. Soccer star Cristiano Ronaldo was born on February 5, 1985, on the island of Madeira, which is a few hundred miles south of Portugal. He grew up in a small house in the city of Funchal and began playing soccer for a youth team in Madeira, where his dad was the team's equipment manager.