Nanaloricida MCQs January 8, 2026September 30, 2024 by u930973931_answers 30 min Score: 0 Attempted: 0/30 Subscribe 1. Nanaloricida belongs to which phylum? (A) Loricifera (B) Arthropoda (C) Nematoda (D) Annelida 2. What is the primary habitat of Nanaloricida? (A) Freshwater (B) Coral reefs (C) Terrestrial soil (D) Deep-sea sediments 3. Which of the following structures is characteristic of Nanaloricida? (A) Lorica (protective outer casing) (B) Shell (C) Tentacles (D) Jointed appendages 4. What kind of body symmetry do Nanaloricida exhibit? (A) Radial symmetry (B) Bilateral symmetry (C) Asymmetry (D) Pentamerous symmetry 5. Nanaloricida are primarily found in which type of environment? (A) Desert (B) Alpine regions (C) Tropical rainforests (D) Marine sediments 6. The name “Loricifera” is derived from the Latin word “lorica,” which refers to what? (A) A reproductive structure (B) A swimming appendage (C) A sensory organ (D) A type of armor 7. What is the primary mode of reproduction in Nanaloricida? (A) Budding (B) Asexual reproduction (C) Sexual reproduction (D) Binary fission 8. What is the approximate size range of Nanaloricida organisms? (A) 1 mm to 3 mm (B) 100 mm to 500 mm (C) 100 µm to 500 µm (D) 5 cm to 10 cm 9. Nanaloricida have what type of digestive system? (A) Absent (B) Incomplete (C) Complete (D) Photosynthetic 10. Nanaloricida are known for being one of the few animals capable of surviving in what kind of environment? (A) Arctic ice sheets (B) High-altitude regions (C) Volcanic vents (D) Oxygen-depleted environments 11. The body of Nanaloricida is divided into how many main regions? (A) 5 (B) 3 (C) 2 (D) 1 12. What is the outer layer of Nanaloricida called? (A) Cuticle (B) Exoskeleton (C) Lorica (D) Scales 13. Which structure helps Nanaloricida anchor themselves in the sediment? (A) Lorica (B) Head spines (C) Feet (D) Proboscis 14. Which class of organisms do Nanaloricida feed on? (A) Fungi (B) Bacteria (C) Other Loricifera (D) Algae 15. Nanaloricida are considered to be what type of feeders? (A) Filter feeders (B) Parasites (C) Deposit feeders (D) Herbivores 16. How do Nanaloricida obtain oxygen in anoxic environments? (A) By capturing air bubbles (B) Through specialized gills (C) By diffusion through their skin (D) Via anaerobic metabolism 17. Nanaloricida exhibit what kind of larval stage? (A) Planula larva (B) Parasitic larva (C) Sessile larva (D) Swimming larva 18. Nanaloricida are part of which superphylum? (A) Ecdysozoa (B) Lophotrochozoa (C) Deuterostomia (D) Protostomia 19. Which of the following is absent in Nanaloricida? (A) Nervous system (B) Excretory system (C) Reproductive system (D) Digestive system 20. Nanaloricida are classified as: (A) Parasitic (B) Predatory (C) Sessile (D) Free-living 21. What kind of nervous system do Nanaloricida have? (A) None (B) Radial nervous system (C) Brain and spinal cord (D) Ladder-like nervous system 22. What do Nanaloricida use for sensing their environment? (A) Sensory bristles (B) Tentacles (C) Eyes (D) Antennae 23. Nanaloricida exhibit direct or indirect development? (A) Direct (B) Both depending on species (C) Indirect with larval stages (D) No development 24. How do Nanaloricida move through sediments? (A) Crawling with head spines (B) Ciliary movement (C) Swimming (D) Flagellar propulsion 25. What is the significance of the lorica in Nanaloricida? (A) It aids in locomotion (B) It helps in feeding (C) It provides protection (D) It serves as a reproductive organ 26. Which of the following is true about Nanaloricida’s digestive tract? (A) It has separate mouth and anus (B) It is incomplete (C) It is absent (D) It is a single opening for both ingestion and excretion 27. What kind of metabolic process do Nanaloricida exhibit in extreme environments? (A) Aerobic respiration (B) Chemosynthesis (C) Photosynthesis (D) Anaerobic metabolism 28. Nanaloricida are members of which kingdom? (A) Plantae (B) Fungi (C) Animalia (D) Protista 29. Nanaloricida are primarily found at which ocean depths? (A) Intertidal zones (B) Riverbeds (C) Coral reefs (D) Deep-sea habitats 30. Nanaloricida contribute to the ecosystem by: (A) Pollinating plants (B) Breaking down organic matter (C) Fixing nitrogen (D) Consuming detritus