The best way to distinguish very simple organisms, such as bacteria, from more complex organisms, such as protists, plants, and animals, is:
**C. by cell type, such as prokaryotic versus eukaryotic.**
Bacteria are prokaryotic organisms, meaning they lack a nucleus and other membrane-bound organelles, whereas protists, plants, and animals are eukaryotic organisms that have a defined nucleus and organelles. This distinction is fundamental in the