You are looking at a plankton sample and find a single-celled organism with a glassy internal skeleton that gives it an elaborate geometric shape.It has a greenish golden color derived from photosynthetic endosymbionts within the organism.This organism is most likely a
A) dinoflagellate.
B) plasmodial slime mold.
C) radiolarian.
D) diatom.
E) coral.

Question

Quizplus · Accepted Answer

Radiolarians are single-celled organisms that have a glassy internal skeleton called a test, which gives them an intricate geometric shape. They often have photosynthetic endosymbionts that give them a greenish-golden color. Dinoflagellates also have a glassy internal structure, but they typically have two flagella and are not known for their geometric shape. Plasmodial slime molds are multicellular and do not have a glassy internal structure. Diatoms also have a glassy structure, but they typically have a symmetrical shape and do not have photosynthetic endosymbionts. Corals are multicellular organisms that do not have a glassy structure or photosynthetic endosymbionts.

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