Eukaryotes contain linear chromosomes and therefore require telomerase to prevent loss of the ends of the chromosomes
The ATP is the adenosine triphosphate. The ATP molecule has the three phosphate molecules attached with the adenosine. The ADP is the adenosine diphosphate. It has two phosphate groups. The number of phosphate molecules is responsible for the amount of energy in bonds. Hence the ATP molecule has the three phosphate group hence it has more stored energy as compared to the ADP molecule which has two phosphate group.
I feel like it's D, Because adaption have something to do we behavior and structure...Hope that helps