Nematomorpha MCQs December 4, 2025September 30, 2024 by u930973931_answers 30 min Score: 0 Attempted: 0/30 Subscribe 1. What are Nematomorpha commonly known as? (A) Horsehair worms (B) Ribbon worms (C) Flatworms (D) Roundworms 2. Which of the following is a characteristic feature of Nematomorpha? (A) Segmented body (B) Parasitic lifestyle in adults (C) Long, slender body (D) Complex nervous system 3. What is the typical habitat of Nematomorpha? (A) Deep-sea environments (B) Terrestrial ecosystems (C) Freshwater and marine environments (D) Extreme deserts 4. The life cycle of Nematomorpha typically includes: (A) Only free-living adults (B) Parasitic larval stages in hosts (C) Direct development (D) Budding 5. Nematomorpha larvae are primarily parasites of: (A) Birds (B) Mammals (C) Reptiles (D) Aquatic insects 6. Adult Nematomorpha are known for their ability to: (A) Emerge from hosts upon maturity (B) Burrow into soil (C) Parasitize multiple hosts (D) Swim rapidly 7. Which of the following structures do Nematomorpha use for attachment to their host? (A) Suckers (B) Adhesive glands (C) Hooks (D) Tentacles 8. What is the main feeding strategy of adult Nematomorpha? (A) Predation (B) Filter feeding (C) Photosynthesis (D) Absorbing nutrients from the environment 9. The reproductive strategy of Nematomorpha is generally: (A) Asexual (B) Sexual (C) Parthenogenetic (D) Fragmentation 10. Which of the following is a known genus of Nematomorpha? (A) Caenorhabditis (B) Pseudoceros (C) Nereis (D) Gordius 11. The anatomy of Nematomorpha includes which of the following features? (A) Complex digestive system (B) Closed circulatory system (C) Lack of segmentation (D) Jointed appendages 12. What is the typical length range of adult Nematomorpha? (A) 1 to 5 mm (B) 10 to 100 cm (C) 5 to 10 cm (D) Over 1 meter 13. The body of Nematomorpha is typically: (A) Flattened and broad (B) Cylindrical and elongated (C) Irregular and lobed (D) Disc-shaped 14. Which of the following is a significant ecological role of Nematomorpha? (A) Predator of fish (B) Decomposer (C) Primary producer (D) Parasite of insects 15. Hatching of Nematomorpha larvae usually occurs in: (A) Aquatic environments (B) Host tissue (C) Soil (D) On vegetation 16. Which of the following adaptations aids Nematomorpha in their parasitic lifestyle? (A) High fecundity (B) Antigen masking (C) Thick cuticle (D) Complex life cycle 17. Nematomorpha are primarily classified as: (A) Ectoparasites (B) Mutualists (C) Free-living organisms (D) Endoparasites 18. The larvae of Nematomorpha typically infect: (A) Terrestrial mammals (B) Reptiles (C) Birds (D) Aquatic insects 19. Which of the following is NOT a characteristic of Nematomorpha? (A) Thin cuticle (B) Parasitic larvae (C) Free-living adults (D) Segmented body 20. What is the primary mode of locomotion for adult Nematomorpha? (A) Swimming (B) Crawling (C) Jet propulsion (D) Burrowing 21. Hymenocephalida and Nematomorpha are primarily studied for their role in: (A) Aquaculture (B) Biodiversity (C) Parasitology (D) Pest control 22. Which of the following factors affects the distribution of Nematomorpha? (A) Salinity (B) All of the above (C) Availability of hosts (D) Temperature 23. The mouth of Nematomorpha is primarily adapted for: (A) Absorbing nutrients (B) Grinding solid food (C) Filtering small particles (D) Sucking fluids 24. Which of the following is an important aspect of Nematomorpha's ecological impact? (A) They are major herbivores (B) They recycle nutrients in soil (C) They are primary producers (D) They regulate insect populations 25. What is the process by which Nematomorpha larvae leave their host? (A) Metamorphosis (B) Emergence (C) Fission (D) Budding 26. Which structure is primarily responsible for feeding in adult Nematomorpha? (A) Digestive gland (B) Stomach (C) Pharynx (D) Mouthparts 27. The life cycle of Nematomorpha typically requires how many hosts? (A) One (B) Two (C) Three (D) Four 28. What type of symbiotic relationship do Nematomorpha have with their hosts? (A) Mutualistic (B) Commensal (C) Parasitic (D) Neutral 29. Which of the following is a characteristic of Nematomorpha reproduction? (A) Oviparity (B) External fertilization (C) Viviparity (D) Internal fertilization 30. The primary research interest in Nematomorpha includes: (A) Their reproductive strategies (B) All of the above (C) Their evolutionary history (D) Their impact on host populations