[1]  is all the changes that occur over the course of life-g…

  is all the changes that occur over the course of life-grow, develop, and mature. Research has provided several pieces of evidence that genetics plays a role in this process. In 1980, scientists found the first gene to affect the lifespan in C. elegans. This gene was and was found to be involved in the insulin/IGF-1 (insulin growth factor-1) pathway. In 1993, a single gene mutation mutation in daf-2 in C. elegans their lifespan. The daf-2 gene encodes for a receptor protein similar to the receptor in humans. This pathway is a highly conserved evolutionary pathway that is now known to regulate aging, stress resistance, metabolism, and development. When studying aging refers to the the actual amount of time a person has been alive, while refers to how old a person seems, that takes lifestyle factors into consideration including diet, exercise , and sleeping habits, etc.