Protists vary in structure and function more than any other group of organisms. However, here are some common traits: a. All have membrane-bounded organelles, and so are . b. Most are single-celled, or . c. They get their food in several ways. Some contain chloroplasts and do photosynthesis, and so are considered . Others ingest food particles and so are .

a. eukaryotes

b. unicellular

c. autotrophs; heterotrophs

Explanation:

Protists represent a separate kingdom of eukaryotic organisms (ie., organisms whose cells have a nucleus). The most important features of protists include: 1- they are unicellular organisms, 2-contain mitochondria, 3-can be parasites, and 4-generally live in optimal conditions in moist or aquatic environments. In the past, protists were divided into Protozoa (animal-like organisms) and Protophyta (plant-like organisms), which nowadays we know are heterotrophic (also often parasitic) and photosynthetic protists, respectively.