Aging occurs as cells lose their ability to divide, and portions of the telomeres are lost each time a cell divides. Given these facts, the loss in length of what causes cells to age among the following options:
- fur and fat
 - layers of fat
 - cell membrane
 - sunlight
 - Chlorophyll
 - telomeres
 - programmed cell death
 - cancer


 

      telomeres   