Spiruria MCQs December 4, 2025September 30, 2024 by u930973931_answers 30 min Score: 0 Attempted: 0/30 Subscribe 1. Which of the following is a characteristic feature of Spiruria nematodes? (A) Amphids with spiral openings (B) Presence of segmented body (C) Lack of cuticle (D) Well-defined esophagus 2. Spiruria nematodes are primarily known for their: (A) Parasitic lifestyle (B) Free-living lifestyle (C) Both A and B (D) Symbiotic relationships 3. Which of the following genera is a representative of the Spiruria class? (A) Trichinella (B) Wuchereria (C) Ascaris (D) Strongyloides 4. What type of life cycle do most Spiruria nematodes exhibit? (A) Direct life cycle (B) Indirect life cycle (C) Asexual reproduction (D) Budding 5. Which of the following diseases is caused by a Spiruria nematode? (A) Ascariasis (B) Schistosomiasis (C) Malaria (D) Filariasis 6. Spiruria nematodes typically inhabit which type of environment? (A) Aquatic (B) Both A and B (C) Terrestrial (D) Airborne 7. Which structure is primarily used for feeding in Spiruria nematodes? (A) Cloaca (B) Pharynx (C) Mouth with stylet (D) Anus 8. The cuticle of Spiruria nematodes is primarily composed of: (A) Collagen (B) Cellulose (C) Keratin (D) Chitin 9. What is a common method of transmission for Spiruria parasites? (A) Ingestion of eggs (B) Direct contact (C) Airborne spores (D) Mosquito bites 10. Which of the following is NOT a characteristic of Spiruria nematodes? (A) Segmented body (B) Lack of a pharyngeal bulb (C) Spiral amphids (D) Smooth cuticle 11. Spiruria nematodes can be distinguished from other classes by their: (A) Thick cuticle (B) Both A and B (C) Long esophagus (D) Smooth body surface 12. The life cycle of Spiruria nematodes usually includes: (A) Indirect development (B) Direct development (C) Multiple larval stages (D) Parasitic stages only 13. Which of the following Spiruria nematodes is known to cause lymphatic filariasis in humans? (A) Enterobius vermicularis (B) Strongyloides stercoralis (C) Wuchereria bancrofti (D) Ascaris lumbricoides 14. Which of the following statements about Spiruria nematodes is true? (A) They are primarily free-living. (B) They lack a cuticle. (C) They are not significant human pathogens. (D) They often have complex life cycles. 15. Which of the following diseases is associated with the genus Brugia? (A) Onchocerciasis (B) Ascariasis (C) Schistosomiasis (D) Lymphatic filariasis 16. The primary host for many Spiruria nematodes is typically: (A) Amphibians (B) Mammals (C) Birds (D) Reptiles 17. Which structure in Spiruria nematodes is specialized for sensory functions? (A) Pharynx (B) Amphids (C) Cloaca (D) Anus 18. The eggs of Spiruria nematodes are typically: (A) Large and spherical (B) Small and elongated (C) Oval and smooth (D) Irregular and flat 19. Which Spiruria nematode is known for causing river blindness? (A) Loa loa (B) Wuchereria bancrofti (C) Enterobius vermicularis (D) Onchocerca volvulus 20. The primary function of the cuticle in Spiruria nematodes is: (A) Protection (B) Digestion (C) Respiration (D) Movement 21. Which of the following is a significant agricultural pest from the Spiruria class? (A) Dirofilaria (B) Caenorhabditis (C) Ascaris (D) Heterodera 22. Spiruria nematodes are often studied in laboratories due to their: (A) Simple body structure (B) Their role in human health (C) Both A and B (D) Fast reproductive rate 23. Which class do Spiruria nematodes belong to within the phylum Nematoda? (A) Enoplea (B) Chromadorea (C) Spiruria (D) Secernentea 24. The amphids in Spiruria nematodes are primarily: (A) Simple slits (B) Absent (C) Elongated (D) Spiral or circular 25. Which of the following statements about Spiruria nematodes is FALSE? (A) They can be found in various environments. (B) They can be vectors for diseases. (C) They have segmented bodies. (D) They often infect humans and animals. 26. What is the primary host for Wuchereria bancrofti? (A) Cats (B) Humans (C) Dogs (D) Mosquitoes 27. Which structure in Spiruria nematodes is used for reproduction? (A) Anus (B) Pharynx (C) Cloaca (D) Ovipositor 28. Which of the following nematodes is primarily found in the tissues of mammals? (A) Rhabditis (B) Strongyloides (C) Dirofilaria (D) Ascaris 29. The eggs of Spiruria nematodes are generally: (A) Retained in the female body (B) Laid in the environment (C) Laid in water (D) Transmitted through blood 30. Which of the following genera is NOT part of Spiruria? (A) Brugia (B) Wuchereria (C) Onchocerca (D) Caenorhabditis