Phylum Gastrotricha MCQs January 8, 2026September 28, 2024 by u930973931_answers 30 min Score: 0 Attempted: 0/30 Subscribe 1. What is the primary habitat of Gastrotricha? (A) All of the above (B) Freshwater (C) Marine (D) Terrestrial 2. Gastrotricha are primarily known for their: (A) Tiny, worm-like body (B) Ability to swim in water (C) Complex body structure (D) Large size 3. The body of Gastrotricha is typically: (A) Segmented (B) Radially symmetrical (C) Unsegmented (D) Composed of multiple layers 4. What kind of symmetry do Gastrotricha exhibit? (A) Asymmetrical (B) Pentaradial symmetry (C) Radial symmetry (D) Bilateral symmetry 5. The primary mode of locomotion for Gastrotricha is: (A) Ciliary movement (B) Jet propulsion (C) Muscular contraction (D) Swimming with appendages 6. Which of the following best describes the feeding method of Gastrotricha? (A) Predatory (B) Parasitic (C) Herbivorous (D) Suspension feeding 7. Gastrotricha are commonly referred to as: (A) Sea slugs (B) Water bears (C) Velvet worms (D) Hairy backs 8. Which of the following is NOT a characteristic of Gastrotricha? (A) Presence of cilia (B) Soft-bodied (C) Chitinous exoskeleton (D) Microscopic size 9. Gastrotrichs are primarily classified under which category of animals? (A) Vertebrates (B) Invertebrates (C) Echinoderms (D) Arthropods 10. What is the primary reproductive strategy of Gastrotricha? (A) Asexual reproduction only (B) Both asexual and sexual reproduction (C) Sexual reproduction only (D) Budding only 11. Gastrotricha have a body covered with: (A) Scales (B) A hard shell (C) Cilia (D) Mucous 12. Which of the following structures is absent in Gastrotricha? (A) Segmentation (B) An anus (C) A mouth (D) Tentacles 13. What is the primary diet of Gastrotricha? (A) Detritus (B) Larger aquatic organisms (C) Microalgae and bacteria (D) All of the above 14. Gastrotrichs are known for their ability to: (A) Regenerate lost body parts (B) Change color (C) Live in extreme conditions (D) Swim rapidly 15. What kind of reproduction do many Gastrotrichs exhibit? (A) Parthenogenesis (B) Internal fertilization (C) External fertilization (D) Budding 16. Which of the following is a key feature of Gastrotrich anatomy? (A) Presence of a well-defined head (B) Compound eyes (C) Hard exoskeleton (D) Soft-bodied with a cuticle 17. The majority of Gastrotrich species are found in which type of water? (A) Saltwater (B) Both salt and freshwater (C) Freshwater (D) Brackish water 18. Gastrotricha are mostly: (A) Parasitic (B) Free-living (C) Symbiotic (D) Commensal 19. Which of the following types of cells are commonly found in Gastrotricha? (A) Neurons (B) Epithelial cells (C) Muscle cells (D) Ciliated cells 20. Gastrotricha belong to which larger taxonomic group? (A) Mollusks (B) Deuterostomes (C) Echinoderms (D) Protostomes 21. Which of the following describes the digestive system of Gastrotricha? (A) Complete with a mouth and anus (B) Incomplete with only a mouth (C) Absence of a digestive system (D) Complex with multiple chambers 22. Which of the following is a common method of locomotion for Gastrotricha? (A) Swimming (B) Burrowing (C) Floating (D) Crawling 23. The term “Gastrotricha” translates to: (A) Hairy belly (B) Tiny worms (C) Stomach bristles (D) Water bears 24. The main ecological role of Gastrotricha is: (A) Predators in aquatic ecosystems (B) Primary producers (C) Herbivores in freshwater (D) Decomposers in sediments 25. Gastrotricha are often found living on: (A) Algae (B) None of the above (C) Other organisms (D) Substrates of aquatic environments 26. Which of the following is a distinguishing feature of Gastrotricha? (A) Jointed appendages (B) Soft body with a cuticle (C) Presence of gills (D) Segmented body 27. What kind of ecological interactions do Gastrotricha engage in? (A) Parasitism (B) Mutualism (C) Predation (D) Commensalism 28. The habitat of Gastrotricha is generally characterized by: (A) A soft substrate (B) High salinity (C) Fast-moving currents (D) High temperatures 29. What is the significance of cilia in Gastrotricha? (A) Defense mechanism (B) Locomotion and feeding (C) Respiration (D) Reproduction 30. The size of most Gastrotrich species is typically: (A) Several centimeters (B) Micrometers (C) Millimeters (D) Meters