A sessile ciliate
Correct answer: C. Stentor
- A. Radiolarian
- B. Apicomplexan
- C. Stentor
- D. Trichonympha
Explanation
The correct answer is Stentor. Stentor is a sessile ciliate, meaning it is typically attached to substrates in its environment. Its unique trumpet-like shape allows it to effectively filter feed. Radiolarian are not sessile; they are free-floating and primarily marine organisms with siliceous skeletons. Apicomplexan are parasitic and not characterized by being sessile or having cilia. Trichonympha are flagellates, not ciliates, and live symbiotically in the guts of termites, not as sessile organisms.
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