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MCQ · Q4

Q.The stinging cells characteristic of phylum Coelenterata (Cnidaria) are called

(a) Choanocytes
(b) Cnidoblasts
(c) Flame cells
(d) Nephridia
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Step 1. Choanocytes are the flagellated collar cells of sponges (Porifera), not coelenterates.

Step 2. Flame cells are excretory cells of flatworms (Platyhelminthes), and nephridia are the excretory organs of Annelida — neither is a stinging cell. …

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