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Phylum Mollusca is the second largest phylum in the Animal kingdom.

Phylum Mollusca is the second largest phylum in the Animal kingdom. They play a very important role in the lives of humans. They are a great source of jewellery, food and other natural pearls. Explore more:  M ollusca Here are solved important MCQs on Mollusca, types and its importance. 1. Octopus belongs to the class________. (a) Mollusca (b) Pelecypoda (c) Cephalopoda (d) None of the above Sol: (c) Cephalopoda. 2. Which of the following statements is true about Mytilus? (a) Mytilus belongs to class Arthropoda of phylum Mollusca (b) Mytilus belongs to class Amphineura of phylum Mollusca (c) Mytilus belongs to class Pelecypoda of phylum Mollusca (d) Mytilus belongs to class Echinodermata of phylum Mollusca Sol: (c) Mytilus belongs to class Pelecypoda of phylum Mollusca 3. Which of the following statements is true about Unio? (a) Unio has a one chambered heart (b) Unio has a two-chambered heart (c) Unio has a three-chambered heart (d) None of the above Sol: (c) Unio has a three-chambered heart. 4. Most molluscs are of __________. (a) Marine Habitats (b) Terrestrial Habitats (c) Freshwater Habitats (d) All of the above Sol: (a) Marine Habitats. 5. Which of the following does not belong to phylum Mollusca? (a) Sea Hare (b) Sea mica (c) Sea lemon (d) Sea feather Sol: (d) Sea feather. 6. Which of the following does not belong to phylum Mollusca? (a) Decapoda (b) Gastropoda (c) Cephalopoda (d) All of the above Sol: (a) Decapoda. 7. Which of the following is the largest invertebrate? (a) Architeuthis (b) Sepia (c) Loligo (d) Octopus Sol. (a) Architeuthis. 8. The most advanced molluscs belong to the class _______ (a) Amphineura (b) Cephalopoda (c) Gastropoda (d) Monopacophora Sol.(d) Monopacophora. 9. What is the common name of a devilfish? (a) Loligo (b) Sepia (c) Teredo (d) Octopus Sol. (d) Octopus. 10. Which of the following is called the “Pearl Mother Layer”? (a) Nacre (b) Mantle (c) Periostracum (d) Prismatic layer Sol.(a) Nacre. Also Refer:   Phylum and Subphylum in Animal Kingdom

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