Describe a mutation that could occur in a species that might increase the lifespan of the species. Be sure to justify your response in two or more complete sentences.

One example of a mutation that could occur in a species that might increase its lifespan is increased bone density. With high bone density, an animal is more likely to survive a heavy hit with no bone damage. This, in turn, means that the animal's vital organs are able to be protected by the bones, meaning the difference between life and death.