From porifera to annelida any one animal .write explaination and Dia. And from protista two useful and two harmful protista.
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Explanation:
Sycon. Spongilla. Hylonema. Cliona. are eg of porifera.
earthworms, leeches, and many marine worms come under annelida.
Brown and Red Algae are useful protists.
Trypanosoma protozoa and Giardia protozoa are harmful.
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