A Snail-Like, Coiled, Porous Test (Shell)of Calcium Carbonate is Characteristic

Question

A snail-like, coiled, porous test (shell)of calcium carbonate is characteristic of which group?
A) diatoms
B) foraminiferans
C) radiolarians
D) gymnamoebas

Accepted Answer

The description matches that of foraminiferans, which are single-celled protists that secrete shells (tests) made of calcium carbonate. These shells are often coiled and porous, similar to a snail's shell. Diatoms have shells made of silica and are not typically coiled, radiolarians have shells made of silica but are typically not porous or coiled, and gymnamoebas do not secrete shells at all.