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The phylum of sedentary arrimals is

The mollusc composes the large phylum Mollusca of invertebrate animals. Molluscs are the largest marine phylum, comprising about 23% of all the named marine organisms.

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Reproductive structure are flowers in

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Phylum mollusca can be distinguished from other nonchordates by the presence of

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Choanocytes are unique to

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Cnidaria is characterised by