Protists and Bacteria are Grouped into Different Domains Because

Question

Protists and bacteria are grouped into different domains because
A) protists eat bacteria.
B) bacteria are not made of cells.
C) protists have a membrane-bounded nucleus, which bacterial cells lack.
D) bacteria decompose protists.
E) protists are photosynthetic.

Accepted Answer

Protists have a membrane-bounded nucleus, which bacterial cells lack. This is the main reason they are grouped into different domains - Protists have a eukaryotic cell structure, while bacteria have a prokaryotic cell structure.