One small step

 作者:慎郇猢     |      日期:2019-03-06 06:18:02
By Rachel Nowak in Melbourne THE distant ancestor of complex life forms, including humans, came into being when a virus infected a simple bacterium-like cell and took control, according to a controversial new theory. But many experts are finding it hard to accept the idea that simple viruses could have had such a big impact on evolution. Philip Bell of Macquarie University in Sydney devised his theory to explain how the cells that make up complex creatures such as humans got their nuclei,