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Question
Which special cells are present in the body of sponges (Porifera)?
Options
Collar cells
Cnidoblasts
Germ cells
Ectodermal cells
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Solution
Collar cells
Explanation:
Porifera organisms are attached to the substrate. They do not show locomotion. To collect and capture food, they must generate a current in the water. They possess characteristic collar cells throughout their bodies for this reason. Germ cells and ectodermal cells are present in all other phyla. Cnidoblasts are a characteristic feature of coelenterates.
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