Eutardigrada MCQs January 8, 2026September 30, 2024 by u930973931_answers 30 min Score: 0 Attempted: 0/30 Subscribe 1. What is the primary habitat of Eutardigrada? (A) Freshwater and marine (B) Terrestrial (C) Desert (D) Soil 2. Eutardigrada are commonly known as what? (A) Water bears (B) Tardigrades (C) Sea cucumbers (D) Marine worms 3. Which of the following features is characteristic of Eutardigrada? (A) Segmented body (B) Eight legs (C) Presence of wings (D) Rigid exoskeleton 4. Eutardigrada primarily feed on what? (A) Detritus (B) Algae and phytoplankton (C) Blood of other organisms (D) Plant cells and microorganisms 5. Which structure helps Eutardigrada in locomotion? (A) Lobopods (B) Tentacles (C) Fins (D) Cilia 6. What is the reproductive strategy of Eutardigrada? (A) Sexual reproduction (B) Asexual reproduction (C) Budding (D) Parthenogenesis 7. Which of the following statements about Eutardigrada is true? (A) They have a complex circulatory system. (B) They can survive extreme conditions. (C) They are exclusively marine organisms. (D) They possess complex eyes. 8. What type of body symmetry do Eutardigrada exhibit? (A) Radial symmetry (B) Pentaradial symmetry (C) Asymmetry (D) Bilateral symmetry 9. Which environment do Eutardigrada commonly inhabit? (A) Mosses and lichens (B) Deep sea (C) High altitude (D) Sandy beaches 10. What type of digestive system do Eutardigrada possess? (A) Simple sac-like (B) Incomplete digestive system (C) Complete digestive system (D) No digestive system 11. Eutardigrada are known for their ability to survive in what conditions? (A) Extreme heat (B) High pressure (C) Low oxygen (D) Extreme desiccation 12. Which structure is primarily involved in respiration for Eutardigrada? (A) Gills (B) Body surface (C) Lungs (D) Specialized breathing structures 13. What is the body cavity of Eutardigrada called? (A) Coelom (B) Gastrovascular cavity (C) Pseudocoelom (D) Hemocoel 14. Which of the following is NOT a characteristic of Eutardigrada? (A) Soft-bodied (B) Rigid exoskeleton (C) Presence of lobopods (D) Lack of segmentation 15. What is the typical size range of Eutardigrada species? (A) 0.1-0.5 mm (B) 3-5 mm (C) 1.5-3 mm (D) 0.5-1.5 mm 16. Which of the following describes the Eutardigrada’s ability to enter a dormant state? (A) Torpor (B) Hibernation (C) Estivation (D) Cryptobiosis 17. Which of the following statements about Eutardigrada is correct? (A) They have a complex circulatory system. (B) They can endure extreme temperatures. (C) They are primarily herbivorous. (D) They exhibit complex reproductive behaviors. 18. What type of symmetry do Eutardigrada exhibit? (A) Radial symmetry (B) Bilateral symmetry (C) Asymmetry (D) Pentaradial symmetry 19. What is the primary food source for Eutardigrada? (A) Other animals (B) Plants (C) Microorganisms (D) Detritus 20. Which of the following structures helps Eutardigrada in nutrient absorption? (A) Tentacles (B) Stylet (C) Gills (D) Mucus layer 21. How do Eutardigrada typically respond to adverse environmental conditions? (A) Migration (B) Hibernation (C) Reproduction (D) Entering a cryptobiotic state 22. Which structure is used by Eutardigrada for excretion? (A) Nephridia (B) Coelomoducts (C) Malpighian tubules (D) Body surface 23. What type of environment do Eutardigrada prefer? (A) Dry and arid (B) High salinity (C) Moist and humid (D) Cold and icy 24. Eutardigrada belong to which larger group of animals? (A) Mollusca (B) Arthropoda (C) Ecdysozoa (D) Deuterostomia 25. What type of locomotion do Eutardigrada primarily use? (A) Jet propulsion (B) Gliding (C) Crawling (D) Floating 26. Which of the following is a common predator of Eutardigrada? (A) Small fish (B) Amphibians (C) Birds (D) Larger invertebrates 27. What kind of reproductive strategy do Eutardigrada exhibit? (A) Internal fertilization (B) External fertilization (C) Asexual reproduction (D) Budding 28. Which of the following organisms are considered relatives of Eutardigrada? (A) Onychophorans (B) Annelids (C) Mollusks (D) Echinoderms 29. What is the primary ecological role of Eutardigrada? (A) Decomposers (B) Primary producers (C) Predators (D) Parasites 30. Which of the following best describes the physical appearance of Eutardigrada? (A) Long and thin (B) Cylindrical and elongated (C) Flat and ribbon-like (D) Stout and plump