Monoplacophora MCQs December 4, 2025September 30, 2024 by u930973931_answers 30 min Score: 0 Attempted: 0/30 Subscribe 1. What is the common name for members of the class Monoplacophora? (A) Limpets (B) Tusk shells (C) Chitons (D) Neopilina 2. What type of shell do Monoplacophora typically possess? (A) Coiled (B) Conical (C) Flat and cap-like (D) Spiraled 3. Which of the following is a characteristic feature of Monoplacophora? (A) Segmentation (B) Complex eyes (C) A highly developed foot (D) A soft body 4. Monoplacophora primarily inhabit which type of environment? (A) Freshwater (B) Terrestrial (C) Brackish water (D) Marine 5. What is the primary feeding mechanism of Monoplacophora? (A) Predation (B) Filter feeding (C) Herbivory (D) Detritivory 6. What structure do Monoplacophora use for respiration? (A) Skin (B) Gills (C) Mantle (D) Foot 7. Which of the following is a common genus of Monoplacophora? (A) Neopilina (B) Dentalium (C) Mytilus (D) Nautilus 8. What type of symmetry do Monoplacophora exhibit? (A) None of the above (B) Radial symmetry (C) Asymmetry (D) Bilateral symmetry 9. What is the primary ecological role of Monoplacophora? (A) Predators (B) Herbivores (C) Parasites (D) Decomposers 10. Monoplacophora are most closely related to which other class of mollusks? (A) Gastropoda (B) Bivalvia (C) Polyplacophora (D) Cephalopoda 11. Which of the following structures is primarily used for excretion in Monoplacophora? (A) Foot (B) Gills (C) Mantle (D) Nephridia 12. How do Monoplacophora reproduce? (A) Budding (B) Asexual reproduction (C) Fragmentation (D) Sexual reproduction 13. Which feature is notable about the nervous system of Monoplacophora? (A) Highly developed (B) Very complex (C) Lacking any form of brain (D) Simplistic and decentralized 14. What is the main diet of Monoplacophora? (A) Coral (B) Plankton (C) Algae and detritus (D) Small fish 15. What type of circulatory system do Monoplacophora possess? (A) Open circulatory system (B) Closed circulatory system (C) No circulatory system (D) Hemocoel 16. Which of the following adaptations helps Monoplacophora survive in their environment? (A) Camouflage (B) Ability to burrow (C) Protective shell (D) Ability to swim 17. What is the larval stage of Monoplacophora called? (A) Veliger (B) Zoea (C) Nauplius (D) Trochophore 18. The shell of Monoplacophora is primarily composed of what material? (A) Keratin (B) Chitin (C) Silica (D) Calcium carbonate 19. What do Monoplacophora use their foot for? (A) Locomotion and anchoring (B) Digestion (C) Respiration (D) Reproduction 20. What kind of environment are Monoplacophora typically found in? (A) Intertidal zones (B) Coral reefs (C) Deep sea (D) Coastal waters 21. Monoplacophora are often considered to be: (A) Decomposers (B) Highly evolved mollusks (C) Parasites (D) Primitive mollusks 22. Which of the following characteristics is common among Monoplacophora? (A) They have a closed circulatory system (B) They possess a radula (C) They have complex eyes (D) They are terrestrial 23. What is the size range for most Monoplacophora species? (A) 5-10 cm (B) 1-5 cm (C) 10-20 cm (D) 20-30 cm 24. Which of the following is true about Monoplacophora's habitat preferences? (A) They live in deep oceanic environments (B) They are exclusively freshwater species (C) They prefer warm shallow waters (D) They are only found on coral reefs 25. Which structure in Monoplacophora is primarily responsible for feeding? (A) Radula (B) Tentacles (C) Foot (D) Gills 26. What is the main reproductive strategy of Monoplacophora? (A) Internal fertilization (B) External fertilization (C) Asexual reproduction (D) Budding 27. Scavenging in Monoplacophora is primarily done by: (A) Siphoning (B) Both A and C (C) Filter feeding (D) Crawling 28. Monoplacophora are important for which aspect of the ecosystem? (A) Water purification (B) Coral growth (C) Biodiversity (D) Nutrient cycling 29. The shell of Monoplacophora can be described as: (A) Multi-chambered (B) Smooth and shiny (C) Flat and uncoiled (D) Thick and heavy 30. Which of the following adaptations helps Monoplacophora in their detritivorous feeding? (A) Long tentacles (B) A complex digestive system (C) A radula with scraping capabilities (D) A wide mouth