Some protists form long, foot-like projections of their cell membrane and cytoplasm that are used for movement and to capture food. What are these structures called?

A. cilia

B. flagella

C. mycelia

D. pseudopods

I think the correct answer from the choices listed above is option B. Some protists form long, foot-like projections of their cell membrane and cytoplasm that are used for movement and to capture food. These structures are called flagella. They are a threadlike structure that allows many protozoa, bacteria, spermatozoa to swim.