You are presented with the question "The loss in length of what causes cells to age?" and the following answer choices: 
- fur and fat
 - layers of fat
 - cell membrane
 - sunlight
 - Chlorophyll
 - telomeres
 - programmed cell death
 - cancer

Now knowing that aging occurs as cells lose their ability to divide and portions of the telomeres are lost each time a cell divides, choose the best answer.


 

      telomeres   