Didinium nasutum is a single-celled eukaryote that can hunt and feed on other living cells. It has an elaborate anatomy with beating cilia, a "mouth opening," an "anal aperture," and a set of contractile bundles; it can also shoot "darts" to paralyze its prey. What group of living cells does D. nasutum represent?
A) Protozoa
B) Yeasts
C) Algae
D) Animals
E) It can belong to any of the above

Question

Quizplus · Accepted Answer

Protozoa are generally quite complicated in their structure and behavior despite being single-celled, as exemplified by D. nasutum.

Didinium Nasutum Is a Single-Celled Eukaryote That Can Hunt and Feed