You are looking at a plankton sample and find a single-celled organism with an external shell and thin,threadlike pseudopod structures extending through it.This organism is most likely a
A) dinoflagellate.
B) plasmodial slime mold.
C) radiolarian.
D) foraminiferan.
E) diatom.

Question

Quizplus · Accepted Answer

The presence of an external shell and thin, threadlike pseudopods extending through it is a characteristic feature of foraminiferans. Dinoflagellates have two flagella, plasmodial slime molds are multinucleated and lack a definite shape, radiolarians have a siliceous endoskeleton, and diatoms have a silica shell consisting of two valves.

You Are Looking at a Plankton Sample and Find a Single-Celled