That is called MUTUALISM, when both organisms benefit each other.
Answer:
No, not according to any sciences (unless you mean aliens as in immigrants)
Explanation:
When there has been an error in copying a DNA, a DNA repair gene fixes its mistakes. However, a person having an error in his DNA repair gene (which are not corrected), it may lead to gene mutations with the possibility of leading to cancer. The mutations of DNA repair gene can possibly be inherited or acquired.
The Paleozoic era literally translates as the "time of ancient life"
