Which protist group typically consists of amoeboid cells surrounded by a hard outer shell through which cytoplasmic projections extend?

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Rhizarians are a group of protists characterized by their amoeboid morphology, often with hard outer shells (tests) made of various materials, through which they extend cytoplasmic projections called pseudopodia for movement and feeding.

Which Protist Group Typically Consists of Amoeboid Cells Surrounded by a Hard