Heliozoans Are Radially Symmetrical Unicells with Intricate Siliceous Skeletons, Found

Heliozoans are radially symmetrical unicells with intricate siliceous skeletons, found mainly in freshwater plankton. They feed by engulfing food particles that become trapped on the surface of numerous thin ray-like extensions of the cytoplasm that radiate from the surface. Each cytoplasmic extension is made rigid by a central rod of microtubules. Based on this description, Heliozoans would be classified as

A) forams.
B) actinopods.
C) rhizopods.
D) chrysophytes.
E) diatoms.

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