A. They are mostly unicellular
B. They can be autotrophic or heterotrophic
C. They all have cell walls
D. They are eukaryotic
Answer: They all have cell walls
A. They are mostly unicellular
B. They can be autotrophic or heterotrophic
C. They all have cell walls
D. They are eukaryotic
Answer: They all have cell walls
Additional Information: Not all protists have cell walls. Some, like amoebas, lack cell walls.
Subjects: Biological Classification, Biology