The single-celled protists are often mobile, moving within the environment by means of

Question

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Single-celled protists are often mobile and they use different structures to move within the environment. Some protists use pseudopodia for movement, which are temporary extensions of the cell body that can be used for crawling. Others use cilia, which are short, hair-like projections that beat back and forth to propel the cell through the water. Still others use flagella, which are longer whip-like structures that rotate to push the cell forward. Therefore, the best choice is D: all of the above, as some protists can use all three types of structures for movement.

The Single-Celled Protists Are Often Mobile, Moving Within the Environment