Maximum life span is defined as the number of years a newborn ...

[Chloeellawright]

Maximum life span is defined as the
 
  number of years a newborn is likely to live.
  risk of mortality.
  average age at death.
  upper limit to which members of a species can live.

Question 2

The number of years an average newborn of a given species lives is the
 
  maximum life span.
  average life expectancy.
  species life expectancy.
  minimum life span.

[ladyjames123]

Answer to Question 1

upper limit to which members of a species can live.

Answer to Question 2

average life expectancy.