Phylum Cycliophora MCQs January 8, 2026September 28, 2024 by u930973931_answers 30 min Score: 0 Attempted: 0/30 Subscribe 1. What is the common name for organisms in the phylum Cycliophora? (A) Corals (B) Sea cucumbers (C) Wheel animals (D) Jellyfish 2. Cycliophorans are primarily found on which type of organisms? (A) Fish (B) Crustaceans (C) Mollusks (D) Echinoderms 3. What is the primary habitat of Cycliophora? (A) Freshwater environments (B) Marine environments (C) Terrestrial environments (D) Deep ocean trenches 4. Which of the following structures is characteristic of Cycliophora? (A) Tentacles (B) Ctenes (C) Feeding ring (D) Lophophore 5. Cycliophorans are considered to be what type of organisms? (A) Sessile (B) Planktonic (C) Free-swimming (D) Burrowing 6. The phylum Cycliophora was first discovered in which year? (A) 1850 (B) 1990 (C) 1985 (D) 2000 7. What is the life cycle of Cycliophora characterized by? (A) Asexual reproduction only (B) Sexual reproduction only (C) Parasitic stages (D) Both asexual and sexual reproduction 8. Which of the following describes the body structure of Cycliophorans? (A) Segmented body plan (B) Soft-bodied and gelatinous (C) Simple and tubular (D) Rigid and calcareous 9. What is the primary mode of feeding in Cycliophora? (A) Grazing (B) Predation (C) Filter feeding (D) Absorption 10. Which of the following statements about Cycliophora is TRUE? (A) They are mostly found in freshwater. (B) They are symbiotic with crustaceans. (C) They have a complex nervous system. (D) They are parasitic on fish. 11. What is the defining feature of the class Symbion? (A) Presence of tentacles (B) Ability to regenerate (C) Presence of a lophophore (D) Unique feeding structure 12. How do Cycliophorans attach to their hosts? (A) Using suckers (B) Penetrating the host's skin (C) Adhesive secretions (D) By means of a stalk 13. What is the role of the mouth in Cycliophora? (A) Respiration (B) Sensory perception (C) Waste elimination (D) Food intake 14. Which class does the only known species of Cycliophora belong to? (A) Ecdysozoa (B) Cnidaria (C) Hydrozoa (D) Symbion 15. The larval stage of Cycliophora is known as: (A) Cypris (B) Larva (C) Planula (D) Metanauplius 16. Cycliophora have a unique feature in their life cycle known as: (A) Aurelia phase (B) Statocyst development (C) Sexual dimorphism (D) Biphasic cycle 17. Which of the following is a significant characteristic of Cycliophora’s feeding mechanism? (A) Presence of jaws (B) Use of tentacles to capture prey (C) Use of a ciliated feeding structure (D) Filter feeding using gills 18. Cycliophorans are most closely related to which of the following groups? (A) Mollusks (B) Cnidarians (C) Annelids (D) Rotifers 19. The reproductive strategy of Cycliophorans includes which of the following? (A) External fertilization (B) Internal fertilization (C) Asexual budding (D) Fission 20. Cycliophora are known to live in symbiosis with which type of organism? (A) Fish (B) Seaweeds (C) Crustaceans (D) Anemones 21. Which of the following is NOT a known habitat for Cycliophora? (A) In freshwater lakes (B) On the shells of crabs (C) On the gills of lobsters (D) On the bodies of other marine invertebrates 22. The primary ecological role of Cycliophora is: (A) Primary producers (B) Decomposers (C) Parasites (D) Symbiotic partners 23. Cycliophora exhibit which type of symmetry? (A) Radial symmetry (B) Bilateral symmetry (C) Asymmetry (D) Pentaradial symmetry 24. What is the significance of the phylum name “Cycliophora”? (A) Refers to their habitat (B) Refers to their locomotion (C) Refers to their feeding structure (D) Refers to their reproductive cycle 25. Which of the following best describes the life cycle of Cycliophora? (A) Direct development with no larval stage (B) Biphasic, involving both sexual and asexual reproduction (C) Complex with multiple larval forms (D) Only asexual reproduction 26. Cycliophora are classified under which major group of animals? (A) Arthropods (B) Vertebrates (C) Invertebrates (D) Echinoderms 27. The discovery of Cycliophora has contributed to our understanding of: (A) Evolutionary biology (B) All of the above (C) Parasitism (D) Marine ecology 28. Cycliophora possess a structure called the: (A) Lophophore (B) Gills (C) Crown (D) Tentacle 29. What is a potential impact of Cycliophora on their host organisms? (A) They provide nutrients. (B) They cause disease. (C) They may compete for food resources. (D) They enhance growth. 30. The study of Cycliophora is significant for understanding: (A) Marine biodiversity (B) All of the above (C) Symbiotic relationships (D) Ecosystem dynamics