Nearly all cells use ATP as their primary energy source. This is evidence that:
A)life continues to evolve and use novel energy sources.
B)ATP evolved recently (in the last 100 years)as a potential source of energy.
C)the use of ATP by cells began eons ago and has been conserved over time.
D)only eukaryotic cells can produce ATP.
E)fossil fuels are composed of ATP.

Question

Quizplus · Accepted Answer

The fact that nearly all cells use ATP as their primary energy source suggests that the use of ATP by cells began a long time ago and has been conserved over time. ATP is a molecule that is essential for many cellular processes, and it is produced through cellular respiration, a process that occurs in both prokaryotic and eukaryotic cells. Therefore, options A, B, D, and E can be ruled out.

Nearly All Cells Use ATP as Their Primary Energy Source