Pliciloricida MCQs January 8, 2026September 30, 2024 by u930973931_answers 30 min Score: 0 Attempted: 0/30 Subscribe 1. Pliciloricida belongs to which phylum? (A) Arthropoda (B) Nematoda (C) Loricifera (D) Mollusca 2. Pliciloricida are primarily found in which type of environment? (A) Freshwater lakes (B) Coral reefs (C) Forest floors (D) Deep-sea sediments 3. The body of Pliciloricida is covered by what? (A) Scales (B) Exoskeleton (C) Lorica (D) Shell 4. What type of symmetry do Pliciloricida exhibit? (A) Bilateral symmetry (B) Radial symmetry (C) Asymmetry (D) No symmetry 5. Pliciloricida reproduce through which method? (A) Asexual reproduction (B) Budding (C) Sexual reproduction (D) Binary fission 6. The size of Pliciloricida typically falls within which range? (A) 100 µm to 500 µm (B) 1 mm to 3 mm (C) 5 mm to 10 mm (D) 50 cm to 1 meter 7. Pliciloricida belong to which superphylum? (A) Deuterostomia (B) Lophotrochozoa (C) Ecdysozoa (D) Protostomia 8. Which organ system is absent in Pliciloricida? (A) Nervous system (B) Reproductive system (C) Digestive system (D) Excretory system 9. The primary diet of Pliciloricida consists of: (A) Algae (B) Larger animals (C) Bacteria (D) Plant material 10. What is the primary function of the lorica in Pliciloricida? (A) Locomotion (B) Protection (C) Reproduction (D) Feeding 11. How do Pliciloricida move? (A) Crawling using head spines (B) Flagella (C) Swimming using fins (D) Cilia 12. Pliciloricida exhibit which type of feeding mechanism? (A) Suspension feeding (B) Deposit feeding (C) Predation (D) Parasitism 13. Pliciloricida larvae are typically: (A) Free-swimming (B) Sessile (C) Parasitic (D) Burrowers 14. Pliciloricida survive in oxygen-depleted environments by: (A) Anaerobic metabolism (B) Producing oxygen (C) Storing oxygen (D) Filtering oxygen from water 15. Which type of nervous system do Pliciloricida possess? (A) Radial nervous system (B) No nervous system (C) Centralized brain and nerve cord (D) Ladder-like nervous system 16. Pliciloricida larvae resemble which stage in other invertebrates? (A) Nauplius (B) Planula (C) Trochophore (D) None of the above 17. Pliciloricida are considered part of which ecological group? (A) Decomposers (B) Microfauna (C) Herbivores (D) Carnivores 18. The digestive system of Pliciloricida is: (A) Absent (B) Incomplete with only one opening (C) Complete with a mouth and anus (D) Shared with other organisms 19. Pliciloricida are primarily found at what depth in the ocean? (A) Deep-sea environments (B) Mid-ocean range (C) Shallow coastal waters (D) Surface waters 20. Pliciloricida reproduce by: (A) Fragmentation (B) Budding (C) Binary fission (D) Sexual reproduction 21. Which sensory structures do Pliciloricida use to navigate their environment? (A) Tentacles (B) Sensory bristles (C) Antennae (D) Photoreceptors 22. Pliciloricida are placed within the kingdom: (A) Protista (B) Plantae (C) Animalia (D) Fungi 23. Which of the following best describes the locomotion of Pliciloricida? (A) Crawling using head appendages (B) Sessile (C) Ciliary movement (D) Free-swimming 24. Pliciloricida’s head spines serve which purpose? (A) Defense (B) Feeding (C) Anchoring to sediments (D) Reproduction 25. The unique armor-like covering of Pliciloricida is called: (A) Cuticle (B) Mantle (C) Shell (D) Lorica 26. Pliciloricida are capable of surviving extreme conditions due to: (A) Thick exoskeleton (B) Anaerobic metabolic processes (C) Ability to hibernate (D) Photosynthesis 27. In Pliciloricida, fertilization is typically: (A) External (B) Budding (C) Asexual (D) Internal 28. Which of the following is absent in the anatomy of Pliciloricida? (A) Mouth (B) Excretory organs (C) Nervous system (D) Sensory structures 29. Pliciloricida larvae are released into: (A) Sediment pockets (B) Open water (C) Host organisms (D) Reefs 30. What is the ecological role of Pliciloricida in marine ecosystems? (A) Predators (B) Decomposers (C) Microdetritivores (D) Parasites