Rhabditia 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 Rhabditia nematodes? (A) Segmented body (B) Well-developed pharynx (C) Lack of a cuticle (D) Absence of amphids 2. Rhabditia nematodes are primarily found in which type of environment? (A) Aquatic (B) Both A and B (C) Terrestrial (D) Airborne 3. Which of the following genera is commonly associated with Rhabditia nematodes? (A) Ascaris (B) Heterodera (C) Caenorhabditis (D) Meloidogyne 4. Which species is the model organism often used in genetic studies among Rhabditia? (A) Pristionchus pacificus (B) Rhabditis sp. (C) Caenorhabditis elegans (D) Steinernema carpocapsae 5. What is the main feeding strategy of Rhabditia nematodes? (A) Predatory (B) Saprophytic (C) Parasitic (D) Herbivorous 6. The reproductive strategy of Rhabditia nematodes generally involves: (A) Asexual reproduction (B) Sexual reproduction (C) Parthenogenesis (D) Budding 7. Which of the following is NOT a common habitat for Rhabditia nematodes? (A) Soil (B) Freshwater (C) Marine environments (D) Ice 8. The body shape of Rhabditia nematodes is typically: (A) Flattened (B) Cylindrical (C) Irregular (D) Discoidal 9. The amphids of Rhabditia nematodes are primarily used for: (A) Locomotion (B) Feeding (C) Sensory functions (D) Excretion 10. Which of the following nematodes belongs to the Rhabditia order? (A) Trichinella spiralis (B) Strongyloides stercoralis (C) Ancylostoma duodenale (D) Wuchereria bancrofti 11. The cuticle of Rhabditia nematodes is primarily composed of: (A) Keratin (B) Cellulose (C) Collagen (D) Chitin 12. Which structure in Rhabditia nematodes is primarily responsible for feeding? (A) Mouth (B) Esophagus (C) Pharynx (D) Cloaca 13. Rhabditia nematodes are important in soil ecosystems because they: (A) Prey on insects (B) Decompose organic matter (C) Form symbiotic relationships with plants (D) Produce oxygen 14. Which of the following is a significant research application of Rhabditia nematodes? (A) Medical studies on human parasites (B) Studies on genetics and development (C) Development of pest control methods (D) Assessment of environmental health 15. The larvae of Rhabditia nematodes develop primarily through which process? (A) Parthenogenesis (B) Indirect development (C) Fragmentation (D) Direct development 16. Rhabditia nematodes can be utilized in biological control primarily against which type of pests? (A) Bacteria (B) Weeds (C) Insects (D) Fungi 17. Which of the following statements about Rhabditia nematodes is true? (A) They are all parasitic (B) They lack a pharynx (C) They can be found in extreme environments only (D) They have a simple body plan 18. The primary mode of locomotion in Rhabditia nematodes is: (A) Writhing movements (B) Swimming (C) Ciliary movement (D) Jet propulsion 19. Which of the following best describes the life cycle of Rhabditia nematodes? (A) Complex, with multiple hosts (B) Simple, with a single host (C) Indirect, involving multiple hosts (D) Direct, with a single host 20. Which of the following nematodes is commonly used as a model organism in laboratory studies? (A) Caenorhabditis elegans (B) Rhabditis (C) Strongyloides (D) Heterodera 21. The typical diet of Rhabditia nematodes consists of: (A) Algae (B) Plant roots (C) Animal tissues (D) Fungi and bacteria 22. Rhabditia nematodes are often studied in ecology due to their role in: (A) Oxygen production (B) Phosphorus absorption (C) Carbon fixation (D) Nitrogen cycling 23. The eggs of Rhabditia nematodes are typically: (A) Laid in soil (B) Laid in water (C) Retained within the female (D) Distributed through air 24. Which of the following is a common method for isolating Rhabditia nematodes from soil samples? (A) Filtration (B) Centrifugation (C) Boiling (D) Baermann funnel technique 25. Rhabditia nematodes are primarily studied for their role in: (A) Soil health (B) Animal diseases (C) Human diseases (D) Water quality 26. Which of the following structures in Rhabditia nematodes is involved in reproduction? (A) Excretory canal (B) Cloaca (C) Pharynx (D) Oviduct 27. The amphids in Rhabditia nematodes serve as: (A) Sensory structures (B) Organs for locomotion (C) Reproductive organs (D) Digestive glands 28. Which of the following is a significant ecological role of Rhabditia nematodes? (A) Decomposition (B) Pollination (C) Nitrogen fixation (D) Carbon sequestration 29. The mouth of Rhabditia nematodes typically contains: (A) A stylet (B) A proboscis (C) Tentacles (D) Teeth 30. Which of the following methods is used for the study of Rhabditia nematodes in genetics? (A) Electrophoresis (B) Microscopy (C) Gene knockout techniques (D) PCR amplification