Which organism is NOT made up of 1or more eukaryotic cells?

A.) a dog

B.) dandelion

C.) radiolarian

D.) methanogen

D

Explanation:

Methanogens are prokaryotes and therefore have prokaryotic cells. They are single-celled archaea. They are found in hypoxic conditions like the first stomach of ruminants where they digest molecules like cellulose and produce methane as a byproduct. The rest are composed of eukaryotic cells which are much larger than prokaryotic cells and their organelles are membrane-bound (unlike prokaryotes).