Correct option is B
The correct answer is: (b) Collar cells
Explanation:
· Choanocytes, also known as collar cells, are specialized flagellated cells found in sponges (Porifera).
· They generate water currents and help in food capture and digestion.
Information Booster:
· Possess a central flagellum surrounded by a collar of microvilli.
· Line the interior of sponge body (spongocoel).
· Aid in filter-feeding and maintaining water flow.
· Structurally similar to choanoflagellates (ancestors of animals).
· Present in asconoid, syconoid, and leuconoid sponge types.
Additional Information:
· Stem cells: Undifferentiated cells capable of developing into specialized cells.
· Flame cells: Excretory cells in flatworms (Platyhelminthes).
· Sperm cells: Male reproductive gametes, not related to sponge anatomy.