  In Misrepair-accumulation theory, we have proposed a Misrepair mechanism for
interpreting aging. However, Misrepair mechanism is also important in
biological adaptation. Misrepair is a strategy of repair for increasing the
surviving chance of an organism when it suffers from severe injuries. As a
surviving strategy, Misrepair mechanism plays also an important role in
individual adaptation, species survival, and species differentiation. Firstly,
Misrepair of an injury is one of the manners of individual adaptation; and
Misrepair mechanism gives an organism a great potential in adapting to
changeable and destructive environment. Secondly, Misrepair mechanism is
important in maintaining and enlarging the diversity of genome DNAs of a
species; and a large diversity of genome DNAs is essential for the adaptation
and the differentiation of a species in different environments. On one hand,
somatic Misrepairs are essential for maintaining the sufficient number of
individuals in a species, which are the vectors of different genome DNAs. On
the other hand, Misrepair of DNA is a source of DNA mutations and the DNA
Misrepairs in germ cells may contribute to the diversity of genome DNAs in a
species. In conclusion, Misrepair mechanism is a mechanism essential for
individual adaptation, species adaptation, and species evolution.
