An adaptation-----------------------
Well, the food is in the environment. I would like to compare it with how bacteriae feed (however my biology is quite rusty), that is, they engulf their food and they "digest" -- not the proper term, since there are no organs to do real digestion -- it.
D <span> microscopes hope it helps </span>
Im not sure but if there was a graph maybe
Cells depend on glucose for energy.