Ans.
Mutations can be defined as permanent alterations in genetic material that pass from mutant parent cell to its daughter cells. Mutations may be beneficiary, harmful, or neutral depending upon the function affected.
For examples, adaptations to certain environmental conditions that provide better chances of survival to the organisms are resulted from mutations, while may disorders, such as cancer are also called by mutations.
Thus, the correct answer is option). 'mutations sometimes improve the chances of survival for an animal.'
