The sponge, a colonial protist, digests its food using ______________________.

A. a saclike gastrovascular cavity
B. phagocytic collar cells and amoeboid cells
C. a single opening through which food enters and wastes leave
D. enzymes secreted by cells lining the gastrovascular cavity
E. a muscular digestive organ that chemically and mechanically breaks down food


Answer: B

Biology & Microbiology

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