Amarine biologist analyzing water samples notices a protist with a calcium carbonate shell that moves by pseudopodia extension. the protist is likely to be closely related to which species?
fuligo septica (dog vomit slime mold)
circogonia icosahedra (radiolarian)
euglena viridis
ammonia tepida

Ammonia tepida

Explanation:

Ammonia tepida  is found in brackish waters around the world, or more precisely in sediments deposited in brackish waters around the world. It can tolerate a wide range of temperatures and degrees of salinity and is considered an ideal species for laboratory studies.

Like most foraminifera, Ammonia tepida  secretes a shell of calcium carbonate, which is deposited on the surface of the cell in the form of a chain of chambers forming a spiral path, making it look like a small conch shell. This characteristic makes us conclude that the correct answer to your question is Ammonia tepida.