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_____ is any soft-bodied invertebrate animal usually wholly or partly enclosed in a calcium carbonate shell secreted by a soft mantle covering the body.
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The term _____ includes certain algae, bacteria, protozoans, and mollusks, as well as representatives from almost every other phylum of animals.
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_____ is any soft-bodied invertebrate animal usually wholly or partly enclosed in a calcium carbonate shell secreted by a soft mantle covering the body.