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  4. Choanocyte is the characteristic feature of

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Q. Choanocyte is the characteristic feature of

VMMC MedicalVMMC Medical 2007

Solution:

Choanocytes or collar cells are characteristic feature of members of phylum-Porifera as in sponges. These cells form endodermis of sponge. Each cells bears a contractile collar at the free end which encircles a single flagellum. Movement of water current takes place by movement of this flagellum. These cells help in food capturing and intracellular digestion in sponges. Phylum-Arthropoda is characterised by jointed legs. Phylum-Annelida is characterised by metamerism.