What is the oldest possible age that members of a species can live under ideal circumstances, approximately for humans?

What is the oldest possible age that members of a species can live under ideal circumstances, approximately for humans?

• A. Maximum life span
• B. Life expectancy
• C. Life span
• D. Longevity limit

Answer: (A)

Maximum life span is the greatest age a member of a species can reach under optimal genetic and environmental conditions. It represents the ceiling of longevity, not the typical or average outcome. Life expectancy, by contrast, is the average number of years a newborn is expected to live given current mortality rates; it varies by era, country, and other factors. While life span can be used loosely to mean how long an individual lives, the standard term for the upper limit is maximum life span. For humans, this ceiling is about 120 to 125 years, with the oldest verified person around 122 years. So the best answer is maximum life span.

Maximum life span is the greatest age a member of a species can reach under optimal genetic and environmental conditions. It represents the ceiling of longevity, not the typical or average outcome. Life expectancy, by contrast, is the average number of years a newborn is expected to live given current mortality rates; it varies by era, country, and other factors. While life span can be used loosely to mean how long an individual lives, the standard term for the upper limit is maximum life span. For humans, this ceiling is about 120 to 125 years, with the oldest verified person around 122 years. So the best answer is maximum life span.