A. They are multicellular and autotrophic
B. They are unicellular and prokaryotic
C. They are unicellular and eukaryotic
D. They are multicellular and heterotrophic
Answer: They are unicellular and eukaryotic
What is the primary characteristic of organisms in the kingdom Protista?
Additional Information: Protista includes unicellular eukaryotic organisms like algae and protozoa.
Subjects: Biological Classification, Biology