First differentiate between average life expectancy, useful life ...

[jace]

First differentiate between average life expectancy, useful life expectancy, and maximum life expectancy. Then discuss biological and environmental factors that contribute to a longer life.
 
  What will be an ideal response?

Question 2

Even though Jennings is only 22 years old, he is already the king of trivia.. If Jennings is typical, his ability to do well in trivia games will most likely
 
  a. decline with age.
 b. remain the same throughout his life.
 c. increase with age.
 d. increase until he is about 40, then decline dramatically.

[raenoj]

Answer to Question 1

Average life expectancy is the age at which half of the people born in a particular year will have died. Useful life expectancy is the number of years that a person is free from debilitating chronic disease and impairment. Maximum life expectancy is the oldest age to which any person lives. Heredity (genetics) is a major determinant of longevity. Environmental factors that impact longevity include diseases, toxins, lifestyle, and social class.

Answer to Question 2

c