Bacteria are prokaryotic cells. By contrast, animal, plant, and fungal cells are eukaryotic. What is the main difference between
prokaryotes and eukaryotes?
Eukaryotes have a cell wall.
Prokaryotes do not have a membrane-bound nucleus.
Eukaryotes copy DNA and are able to reproduce.
Prokaryotes cannot live without a host.
<span>Well active transport absolutely moves substances against their concentration gradient (answer C), although I dislike how the other answers could probably be argued for. This seems to be a case of pick the "best" answer</span>
