Phylum Onychophora MCQs December 5, 2025September 28, 2024 by u930973931_answers 30 min Score: 0 Attempted: 0/30 Subscribe 1. Onychophora is commonly known as what type of organism? (A) Flatworms (B) Segmented worms (C) Roundworms (D) Velvet worms 2. What type of body symmetry do onychophorans exhibit? (A) Bilateral symmetry (B) Radial symmetry (C) Asymmetry (D) None of the above 3. Which of the following best describes the habitat of onychophorans? (A) Aquatic environments (B) Marine environments (C) Terrestrial environments (D) Aerial environments 4. What is the primary mode of locomotion for onychophorans? (A) Swimming (B) Burrowing (C) Flying (D) Crawling 5. Onychophorans possess which unique feature on their bodies? (A) Lobopods (B) Antennae (C) Gills (D) Tentacles 6. Which of the following is a key characteristic of onychophoran anatomy? (A) Exoskeleton (B) Cartilaginous skeleton (C) Hard shell (D) Chitinous cuticle 7. What type of respiratory system do onychophorans possess? (A) Gills (B) Cutaneous respiration (C) Lungs (D) Tracheae 8. Onychophorans primarily feed on: (A) Algae (B) Small invertebrates (C) Detritus (D) Plant material 9. Which structure is used by onychophorans to capture prey? (A) Mandibles (B) Chelicerae (C) Sticky slime glands (D) Antennae 10. What type of reproduction is commonly observed in onychophorans? (A) Asexual reproduction (B) Sexual reproduction (C) Budding (D) Fragmentation 11. Onychophorans are most closely related to which group of animals? (A) Arthropods (B) Annelids (C) Mollusks (D) Cnidarians 12. The life cycle of onychophorans typically includes: (A) Larval stages (B) Metamorphosis (C) Direct development (D) None of the above 13. Which of the following best describes the nervous system of onychophorans? (A) A simple nerve net (B) A pair of cerebral ganglia with ventral nerve cords (C) A diffuse nerve ring (D) Absent 14. What ecological role do onychophorans primarily play? (A) Primary producers (B) Herbivores (C) Predators (D) Decomposers 15. What is the function of the slime produced by onychophorans? (A) Locomotion (B) Defense and prey capture (C) Respiration (D) Excretion 16. Onychophorans typically have how many pairs of lobopods? (A) 2-4 pairs (B) 5-10 pairs (C) 10-20 pairs (D) 14-43 pairs 17. Which of the following statements about onychophorans is true? (A) They are all marine species (B) They possess a complex digestive system (C) They have a segmented body (D) They are exclusively freshwater species 18. Onychophorans are characterized by their ability to: (A) Fly (B) Camouflage (C) Regenerate lost limbs (D) Live in extreme environments 19. The diet of onychophorans consists mainly of: (A) Plant material (B) Bacteria (C) Fungi (D) Small invertebrates and arthropods 20. Which of the following features is NOT found in onychophorans? (A) Jointed appendages (B) Chitinous cuticle (C) True coelom (D) Lobopods 21. What type of circulatory system do onychophorans possess? (A) Open circulatory system (B) Closed circulatory system (C) No circulatory system (D) Diffusion-based 22. What is the primary ecological significance of onychophorans? (A) They help control insect populations (B) They are indicators of soil health (C) They are primary producers (D) They decompose organic material 23. Onychophorans primarily inhabit which type of environment? (A) Desert (B) Arctic tundra (C) Tropical forests (D) High mountains 24. What distinguishes onychophorans from other invertebrates? (A) Presence of a hard shell (B) Development of lobopods (C) Ability to fly (D) Their size 25. Which of the following is a common method of locomotion for onychophorans? (A) Crawling using lobopods (B) Jet propulsion (C) Swimming (D) Burrowing 26. The main predators of onychophorans include: (A) Birds (B) Snakes (C) Other onychophorans (D) Large insects 27. Which feature allows onychophorans to adapt to their moist habitats? (A) Hard exoskeleton (B) Mucous secretion for moisture retention (C) Gills for respiration (D) Ability to store water 28. What is the primary composition of the onychophoran exoskeleton? (A) Calcium carbonate (B) Silica (C) Keratin (D) Chitin 29. Which of the following best describes the eye structure of onychophorans? (A) Compound eyes (B) Simple eyes (ocelli) (C) No eyes (D) Faceted eyes 30. The evolutionary significance of onychophorans is that they provide insight into: (A) The evolution of plants (B) The development of mammals (C) The history of terrestrial life (D) The evolution of arthropods