Mutations may occur in a normal cell as a result of cell division and the effects of environmental and lifestyle factors, such as smoking o r sunlight. Once the first cancer-causing, or driver, mutations occur, defects in cellular processes âfor example, in DNA repairâmay cause more mutations to occur.
U.S. men's national soccer team coach Jurgen Klinsmann out. U.S. men's national team coach Jurgen Klinsmann has been under increased pressure.
USA's midfielder Michael Bradley jumps for the ball next to Panama's midfielder Anibal Godoy. Michael Bradley #4 of the United States and Alberth Elis #19 of Honduras. Ever Alvarado #5 of Honduras trips Sebastian Lletget #9 of the United States. USA's players on the bench in San Jose. Costa Rica's midfielder Joel Campbell (L) dribbles past USA's Matt Besler (R) and John Brooks.