Xenoturbida MCQs January 8, 2026September 30, 2024 by u930973931_answers 20 min Score: 0 Attempted: 0/20 Subscribe 1. What type of animal is classified under Xenoturbida? (A) Fish (B) Worm-like invertebrate (C) Crustacean (D) Mollusk 2. Xenoturbida primarily inhabit which type of environment? (A) Freshwater (B) Terrestrial (C) Airborne (D) Marine 3. What is the body symmetry of Xenoturbida? (A) Radial symmetry (B) Bilateral symmetry (C) Asymmetry (D) Pentaradial symmetry 4. Which of the following statements is true about Xenoturbida? (A) They have a complex nervous system. (B) They are segmented animals. (C) They lack a coelom. (D) They have a distinct head. 5. How many species are currently classified under the class Xenoturbida? (A) One (B) Two (C) Three (D) Four 6. What is the primary diet of Xenoturbida? (A) Detritivorous (B) Herbivorous (C) Carnivorous (D) Omnivorous 7. Which structure is absent in Xenoturbida? (A) Reproductive organs (B) Nervous system (C) Muscles (D) True gut 8. What kind of reproduction do Xenoturbida typically exhibit? (A) Budding (B) Asexual reproduction (C) Sexual reproduction (D) Fragmentation 9. Which of the following is a characteristic feature of Xenoturbida? (A) Hard shell (B) Presence of fins (C) Complex eyes (D) Soft-bodied 10. Xenoturbida are primarily found in which type of habitat? (A) Soft sediments (B) Rocky shores (C) Coral reefs (D) Deep sea trenches 11. The body of Xenoturbida is primarily made up of what type of tissue? (A) Connective tissue (B) Nervous tissue (C) Epithelial tissue (D) Mesodermal tissue 12. Which of the following classes is closely related to Xenoturbida? (A) Mollusca (B) Acoelomorpha (C) Annelida (D) Arthropoda 13. How do Xenoturbida move through their environment? (A) Jet propulsion (B) Ciliary movement (C) Muscular contraction (D) Floating 14. What is the significance of Xenoturbida in evolutionary studies? (A) They provide insights into the evolution of bilateral symmetry. (B) They are ancient fish relatives. (C) They are the ancestors of mollusks. (D) They show complex behaviors. 15. What unique feature is present in the reproductive system of Xenoturbida? (A) Hermaphroditism (B) Separate sexes (C) External fertilization (D) Complex courtship behavior 16. Which of the following is a method used to study Xenoturbida? (A) Observation in aquariums (B) Fossil examination (C) Behavioral experiments (D) Molecular analysis 17. The nervous system of Xenoturbida is characterized by what? (A) A centralized brain (B) Complex ganglia (C) A diffuse nerve net (D) Specialized sense organs 18. Which type of reproduction results in the development of a larval stage in Xenoturbida? (A) Fragmentation (B) Asexual reproduction (C) Budding (D) Sexual reproduction 19. Xenoturbida are known for their ability to burrow into what type of substrate? (A) Coral reefs (B) Hard substrates (C) Rocky surfaces (D) Soft sediment 20. The larvae of Xenoturbida exhibit which type of symmetry? (A) Bilateral symmetry (B) Pentaradial symmetry (C) Radial symmetry (D) Asymmetry