Nuda MCQs January 8, 2026September 28, 2024 by u930973931_answers 30 min Score: 0 Attempted: 0/30 Subscribe 1. What is the defining characteristic of the class Nuda? (A) They possess tentacles. (B) They lack tentacles. (C) They have a hard exoskeleton. (D) They are exclusively marine organisms. 2. Which of the following organisms is classified under Nuda? (A) Comb jellies (B) Sea anemones (C) Box jellyfish (D) Mnemiopsis leidyi (the sea walnut) 3. What type of symmetry do Nuda exhibit? (A) Bilateral symmetry (B) Pentaradial symmetry (C) Asymmetry (D) Radial symmetry 4. How do Nuda primarily capture their prey? (A) Using sticky tentacles (B) Using a mucus layer (C) By engulfing it (D) With specialized feeding structures 5. What role do cilia play in the biology of Nuda? (A) They assist in digestion. (B) They are used for locomotion. (C) They provide structural support. (D) They capture prey. 6. Which of the following best describes the body structure of Nuda? (A) Soft-bodied and gelatinous (B) Rigid and segmented (C) Hard-shelled (D) Chitinous 7. What type of reproduction is commonly observed in Nuda? (A) Asexual reproduction (B) Sexual reproduction (C) Budding (D) Fragmentation 8. What is the primary habitat of Nuda? (A) Freshwater lakes (B) Marine environments (C) Terrestrial environments (D) Brackish water 9. Which of the following statements is true regarding Nuda? (A) They are often free-floating in the ocean. (B) They are primarily benthic organisms. (C) They are typically found in freshwater. (D) They are all bioluminescent. 10. What method of locomotion do Nuda primarily use? (A) Jet propulsion (B) Crawling (C) Swimming with muscular contractions (D) Cilia beating 11. What ecological role do Nuda play in marine ecosystems? (A) Predators of small zooplankton (B) Primary producers (C) Decomposers (D) Herbivores 12. Which of the following structures is unique to Nuda? (A) Stinging cells (B) Tentacles (C) Comb rows (D) Mesoglea 13. How do Nuda respond to environmental changes? (A) They migrate to different habitats. (B) They exhibit rapid adaptation. (C) They are highly sensitive to pollution. (D) They thrive in extreme conditions. 14. What type of diet do Nuda typically have? (A) Herbivorous (B) Detritivorous (C) Omnivorous (D) Carnivorous 15. Which group of organisms is most closely related to Nuda? (A) Hydrozoa (B) Scyphozoa (C) Anthozoa (D) Tentaculata 16. What is the significance of the ciliary rows in Nuda? (A) They help in prey capture. (B) They assist in digestion. (C) They are used for swimming and locomotion. (D) They serve as sensory structures. 17. Which of the following is true about the reproduction of Nuda? (A) They reproduce only asexually. (B) They can exhibit both sexual and asexual reproduction. (C) They reproduce through budding only. (D) They reproduce exclusively through fragmentation. 18. What environmental conditions are ideal for Nuda? (A) High salinity and low temperatures (B) Polluted waters (C) Low oxygen levels (D) Moderate salinity and warm temperatures 19. Which of the following is NOT a feature of Nuda? (A) Presence of cilia (B) Gelatinous body (C) Soft-bodied (D) Possession of tentacles 20. What is the primary feeding strategy of Nuda? (A) Filter feeding (B) Active predation (C) Grazing on algae (D) Scavenging 21. How do Nuda contribute to marine food webs? (A) They are primary producers. (B) They compete with fish for food. (C) They decompose organic matter. (D) They serve as prey for larger marine animals. 22. What kind of nervous system do Nuda possess? (A) Centralized nervous system (B) Diffuse nervous system (C) No nervous system (D) Complex brain structure 23. Which of the following best describes the coloration of Nuda? (A) Brightly colored for warning (B) Camouflaged to blend in with surroundings (C) Dark-colored for deep-water living (D) Transparent or translucent 24. What is the role of mucus in the feeding of Nuda? (A) It helps in digestion. (B) It serves as a buoyancy aid. (C) It protects against predators. (D) It captures and holds onto prey. 25. Which of the following adaptations helps Nuda evade predators? (A) Camouflage (B) Rapid swimming (C) The ability to change color (D) Bioluminescence 26. What is the main ecological concern regarding Nuda populations? (A) Overpopulation in their habitat (B) Invasive species threatening them (C) Climate change affecting their reproductive patterns (D) Habitat destruction 27. How does Nuda locomotion differ from that of other marine invertebrates? (A) They swim using jet propulsion. (B) They rely solely on current for movement. (C) They crawl on the ocean floor. (D) They utilize cilia for swimming. 28. What adaptation allows Nuda to thrive in open water? (A) Ability to tolerate low oxygen levels (B) Resistance to high salinity (C) Ability to anchor to substrates (D) Efficient swimming using cilia 29. What are the major predators of Nuda in the marine ecosystem? (A) Other ctenophores (B) Fish and large crustaceans (C) Sea turtles (D) Marine mammals 30. What is the significance of bioluminescence in Nuda? (A) It serves as a defense mechanism. (B) It attracts prey. (C) It helps in communication. (D) It aids in reproduction.