A. Fluke
B. Nematode
C. Bacteria
D. Volvox

Correct Answer:

Option A – Fluke

Explanation

A flame cell is a specialized excretory cell found in the simplest freshwater invertebrates, including flatworms (fluke, planaria)

Flame cells function like a kidney, removing waste materials.
Excretion of ammonia waste through the body wall, and is not associated with any specific organs

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