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Radula in molluscs is
(a)Excretory structure
(b)Part of gills
(c)File-like rasping organ in mouth
(d)Chemoreceptor

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Important Questions on Animal Kingdom
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The largest class of phylum Mollusca is

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Which of the following bores and destroys pearls and is considered as threat for pearl industry?

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The largest living invertebrate is

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Which of the following is called pearl oyster?

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Aplysia is commonly called

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The diagrams below illustrate different organisms.
Study the images to answer the question that follows.
Which of the organisms is a mollusc with unsegmented body, radula and closed circulatory system?

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A cephalopod without a shell is

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Echinoderms have an endoskeleton of
