Some protists bear a small number of external cellular structures that facilitate swimming by repeatedly bending and straightening.These protists are informally known as:
A)amoebae
B)ciliates
C)algae
D)periphyton
E)flagellates

Question

Quizplus · Accepted Answer

Protists that swim by repeatedly bending and straightening have flagella, which are whip-like structures that propel the organism forward. Therefore, the best choice is E, flagellates. Amoebae move by forming pseudopodia, ciliates move using cilia, algae are a diverse group of photosynthetic protists with many different forms of motility, and periphyton are communities of algae and other microorganisms that grow on surfaces in aquatic ecosystems.

Some Protists Bear a Small Number of External Cellular Structures