Archangulida MCQs December 4, 2025September 30, 2024 by u930973931_answers 30 min Score: 0 Attempted: 0/30 Subscribe 1. What are Archangulida commonly known as? (A) Simple multicellular organisms (B) Parasitic worms (C) Both A and C (D) Marine invertebrates 2. The body structure of Archangulida is typically: (A) Radial (B) Asymmetrical (C) Bilateral (D) Segmented 3. Which of the following is a characteristic of Archangulida? (A) Well-defined organs (B) Parasitic lifestyle (C) Hard exoskeleton (D) Complex nervous system 4. Archangulida are primarily found in: (A) Freshwater environments (B) Terrestrial habitats (C) Marine environments (D) Extreme environments 5. The life cycle of Archangulida typically includes: (A) No known life cycle (B) Asexual reproduction only (C) Direct development (D) Multiple larval stages 6. What type of habitat do Archangulida predominantly inhabit? (A) Coral reefs (B) Coastal areas (C) Deep-sea environments (D) Intertidal zones 7. The feeding mechanism of Archangulida is best described as: (A) Filter feeding (B) Predatory feeding (C) Absorptive feeding (D) Herbivorous feeding 8. Archangulida are characterized by their unique: (A) Movement style (B) Reproductive strategy (C) Symbiotic relationships (D) Body plan 9. Which of the following best describes the reproductive strategy of Archangulida? (A) Asexual reproduction (B) Sexual reproduction (C) Budding (D) Fragmentation 10. What is the primary mode of locomotion in Archangulida? (A) Cilia (B) Flagella (C) They are sessile (D) Muscle contractions 11. The body of Archangulida is divided into how many main regions? (A) One (B) Two (C) Three (D) Four 12. Which of the following is NOT a known genus of Archangulida? (A) Archangulus (B) Rhopalura (C) Saccocirrus (D) Mermithid 13. The nervous system of Archangulida is best described as: (A) Centralized (B) Diffused (C) Absent (D) Highly complex 14. Archangulida have been studied primarily for their role in: (A) Ecosystem functioning (B) Disease transmission (C) Evolutionary biology (D) All of the above 15. The primary mode of feeding for Archangulida is through: (A) Absorption of nutrients (B) Phagocytosis (C) Filter feeding (D) Herbivory 16. What type of symmetry do Archangulida exhibit? (A) Radial symmetry (B) Asymmetrical (C) Bilateral symmetry (D) Pentaradial symmetry 17. The digestive system of Archangulida is: (A) Complete (B) Simple (C) Absent (D) Incomplete 18. What is the primary ecological role of Archangulida? (A) Primary producers (B) Decomposers (C) Parasites (D) Herbivores 19. Archangulida are considered to be: (A) Symmetrical organisms (B) Invertebrates (C) Vertebrates (D) Acoelomates 20. Which of the following is a defining feature of Archangulida reproduction? (A) External fertilization (B) Binary fission (C) Internal fertilization (D) Cloning 21. The body wall of Archangulida is primarily composed of: (A) Muscle (B) Chitin (C) Proteinaceous material (D) Fatty tissues 22. Archangulida are primarily found in which of the following environments? (A) Freshwater (B) Terrestrial (C) Marine (D) Both A and B 23. Which of the following statements about Archangulida is true? (A) They have a complex brain structure. (B) They have a well-defined head. (C) They have a hard outer shell. (D) They lack specialized respiratory organs. 24. Archangulida are characterized by: (A) Complex body structures (B) A simple body plan (C) The presence of a coelom (D) A rigid exoskeleton 25. What is the primary threat to Archangulida populations? (A) Habitat destruction (B) Overfishing (C) Pollution (D) Climate change 26. The primary method of locomotion in Archangulida is: (A) Swimming (B) Crawling (C) They do not move actively (D) Floating 27. Archangulida are often found associated with: (A) Coral reefs (B) Other invertebrates (C) Algae (D) None of the above 28. The body plan of Archangulida typically exhibits: (A) No distinct body regions (B) A central cavity (C) Cephalization (D) All of the above 29. The taxonomy of Archangulida is primarily based on: (A) Molecular data (B) Morphological features (C) Behavioral traits (D) Ecological roles 30. Which of the following adaptations is common in Archangulida? (A) Camouflage (B) Bioluminescence (C) All of the above (D) Toxicity