1.

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

Answer»

Collar CELLS
Cnidoblasts
Germ cells
Ectodermal cells

Solution :Collar cells
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 . FORTHIS purpose , they have characteristic collar cells in their body. Germ cells and ectodermal cells are seen in all other PHYLA. Cnidoblasts are characteristic features of coelenterates.


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