Phylum Tardigrada MCQs January 8, 2026September 28, 2024 by u930973931_answers 30 min Score: 0 Attempted: 0/30 Subscribe 1. Tardigrada are commonly known as: (A) Roundworms (B) Sea cucumbers (C) Flatworms (D) Water bears 2. Tardigrades are primarily found in: (A) Terrestrial environments (B) Aquatic environments (C) Only in extreme conditions (D) Both terrestrial and aquatic environments 3. The body of a tardigrade is divided into: (A) Segments (B) Three main parts: head, trunk, and legs (C) Two main parts: head and abdomen (D) A single unsegmented body 4. Tardigrades possess how many pairs of legs? (A) Two (B) Eight (C) Six (D) Four 5. The primary mode of nutrition in tardigrades is: (A) Saprophagy (B) Carnivorous feeding (C) Filter feeding (D) Photosynthesis 6. Tardigrades can survive extreme conditions due to a process called: (A) Osmobiosis (B) Cryobiosis (C) Anhydrobiosis (D) Hyperbosis 7. Which of the following statements is TRUE about tardigrades? (A) They can withstand extreme temperatures. (B) They have a complex circulatory system. (C) They are only found in freshwater. (D) They have a well-developed respiratory system. 8. Tardigrades are classified under which phylum? (A) Arthropoda (B) Mollusca (C) Annelida (D) Tardigrada 9. The reproductive strategy of tardigrades is primarily: (A) Sexual (B) Asexual (C) Budding (D) Fragmentation 10. Tardigrade eggs can survive: (A) Extreme heat and cold (B) All of the above (C) A vacuum of space (D) High levels of radiation 11. Tardigrades are characterized by a unique body covering called: (A) Exoskeleton (B) Chitin (C) Cuticle (D) Shell 12. Which habitat is NOT typically associated with tardigrades? (A) Mosses and lichens (B) Soils (C) Hot springs (D) Deep ocean trenches 13. Tardigrades exhibit which type of symmetry? (A) Asymmetry (B) Radial symmetry (C) Bilateral symmetry (D) None of the above 14. The first tardigrade was discovered in: (A) 1960 (B) 1850 (C) 1890 (D) 1773 15. Tardigrades can be found in: (A) Ice caps (B) All of the above (C) High altitudes (D) Deserts 16. The mouth of a tardigrade is equipped with: (A) Jaws (B) A proboscis (C) Stylets (D) Mandibles 17. Tardigrades are known for their ability to enter a dormant state known as: (A) Hibernation (B) Aestivation (C) Cryptobiosis (D) Anhydrobiosis 18. The digestive system of tardigrades is: (A) Incomplete (B) Simple (C) Absent (D) Complete 19. In terms of size, tardigrades are typically: (A) 5 to 10 mm long (B) 1 to 5 mm long (C) 0.1 to 0.5 mm long (D) 10 to 20 mm long 20. The study of tardigrades is important for understanding: (A) Environmental science (B) Marine biology (C) Astrobiology (D) All of the above 21. Which of the following organisms are closely related to tardigrades? (A) Nematodes (B) Arthropods (C) Annelids (D) Mollusks 22. Tardigrades were found to survive in the vacuum of space during which mission? (A) Apollo 11 (B) STS-115 (C) FOTON-M3 (D) Mars Exploration Rover 23. Tardigrades primarily reproduce by: (A) Budding (B) Live birth (C) Fission (D) Laying eggs 24. The structure responsible for locomotion in tardigrades is: (A) Cilia (B) Tentacles (C) Flaps (D) Legs 25. The habitat of tardigrades can often be found in: (A) Snow (B) Ocean depths (C) Tree bark (D) All of the above 26. Which environmental condition do tardigrades NOT typically withstand? (A) High pressure (B) Extreme radiation (C) Complete darkness (D) Lack of water 27. The primary role of tardigrades in ecosystems is as: (A) Predators (B) Parasites (C) Decomposers (D) Primary producers 28. The excretory system of tardigrades consists of: (A) No excretory system (B) Malpighian tubules (C) Glands (D) Nephridia 29. Tardigrades belong to which class? (A) Heterotardigrada (B) All of the above (C) Mesotardigrada (D) Eutardigrada 30. Which of the following is a significant adaptation of tardigrades? (A) Ability to photosynthesize (B) Formation of hard shells (C) Tolerance to desiccation (D) Complex social behavior Classes of Tardigrada Heterotardigrada MCQs Eutardigrada MCQs