Tylenchida 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 Tylenchida nematodes? (A) Lack of a cuticle (B) Well-defined esophagus (C) Distinct tail morphology (D) Short, stout body 2. Tylenchida 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 Tylenchida order? (A) Heterodera (B) Caenorhabditis (C) Ascaris (D) Trichinella 4. The life cycle of most Tylenchida nematodes typically includes: (A) Multiple larval stages (B) A single larval stage (C) Direct development (D) Parasitic stages only 5. Which of the following diseases is caused by a Tylenchida nematode? (A) Filariasis (B) Schistosomiasis (C) Ascariasis (D) Root-knot disease 6. Tylenchida nematodes typically inhabit which type of environment? (A) Aquatic (B) Terrestrial (C) Both A and B (D) Airborne 7. Which structure is primarily used for feeding in Tylenchida nematodes? (A) Pharynx (B) Mouth with stylet (C) Cloaca (D) Anus 8. The cuticle of Tylenchida nematodes is primarily composed of: (A) Chitin (B) Collagen (C) Keratin (D) Cellulose 9. What is a common method of transmission for Tylenchida parasites? (A) Ingestion of eggs (B) Soil contamination (C) Airborne spores (D) Direct contact 10. Which of the following is NOT a characteristic of Tylenchida nematodes? (A) Long, slender body (B) Spiral amphids (C) Smooth cuticle (D) Strongly developed esophagus 11. Tylenchida nematodes can be distinguished from other orders by their: (A) Thick cuticle (B) Pharyngeal bulb (C) Both A and B (D) Short esophagus 12. Which of the following Tylenchida nematodes is known to cause root-knot disease in plants? (A) Trichodorus (B) Heterodera (C) Anguina (D) Meloidogyne 13. What is the primary host for many Tylenchida nematodes? (A) Amphibians (B) Birds (C) Plants (D) Reptiles 14. Which of the following statements about Tylenchida nematodes is true? (A) They are primarily free-living. (B) They have segmented bodies. (C) They can affect agricultural crops. (D) They lack a cuticle. 15. Which structure in Tylenchida nematodes is primarily used for sensory functions? (A) Pharynx (B) Amphids (C) Cloaca (D) Anus 16. The eggs of Tylenchida nematodes are typically: (A) Large and spherical (B) Oval and smooth (C) Small and elongated (D) Irregular and flat 17. Which Tylenchida nematode is known for causing cyst nematode disease? (A) Anguina tritici (B) Meloidogyne incognita (C) Globodera (D) Heterodera glycines 18. The primary function of the cuticle in Tylenchida nematodes is: (A) Digestion (B) Protection (C) Respiration (D) Movement 19. Which of the following is a significant agricultural pest from the Tylenchida order? (A) Caenorhabditis (B) Heterodera (C) Ascaris (D) Dirofilaria 20. Tylenchida nematodes are often studied in laboratories due to their: (A) Simple body structure (B) Fast reproductive rate (C) Their role in agriculture (D) Both A and B 21. Which of the following nematodes is primarily found in the roots of plants? (A) Rhabditis (B) Dirofilaria (C) Meloidogyne (D) Ascaris 22. Which of the following statements about Tylenchida nematodes is FALSE? (A) They often infect plants. (B) They can be vectors for diseases. (C) They can be found in various environments. (D) They have segmented bodies. 23. What is the primary method for controlling Tylenchida nematodes in agriculture? (A) All of the above (B) Crop rotation (C) Biological control (D) Chemical pesticides 24. Which structure in Tylenchida nematodes is used for reproduction? (A) Anus (B) Pharynx (C) Cloaca (D) Ovipositor 25. The eggs of Tylenchida nematodes are generally: (A) Transmitted through soil (B) Retained in the female body (C) Laid in water (D) Laid in the environment 26. Which of the following Tylenchida nematodes is known to cause leaf curl disease? (A) Meloidogyne (B) Heterodera (C) Anguina (D) Aphelenchus 27. Which of the following is a method used to diagnose Tylenchida infections in plants? (A) All of the above (B) Visual inspection (C) DNA analysis (D) Soil testing 28. The primary host for Meloidogyne spp. is typically: (A) Humans (B) Animals (C) Fungi (D) Plants 29. Which of the following Tylenchida nematodes is commonly used in biological control? (A) Heterodera (B) Steinernema (C) Caenorhabditis (D) Ascaris 30. What is the major impact of Tylenchida nematodes on agriculture? (A) They promote plant growth. (B) They improve soil quality. (C) They cause crop diseases. (D) They increase biodiversity.