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Which special cells are present in the body of sponges (Porifera)?  1. Collar cells  2. Cnidoblasts  3. Germ cells 

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Which special cells are present in the body of sponges (Porifera)? 

1. Collar cells 

2. Cnidoblasts 

3. Germ cells 

4. Ectodermal cells

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1. Collar cells

Explanation: Porifera animals are attached to the substratum. They do not show locomotion. For gathering and catching the food, they need to produce a current in the water. For this purpose, they have characteristic collar cells in their body. Germ cells and ectodermal cells are seen in all other phyla. Cnidoblasts are characteristic feature of coelenterates.

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