Articulata MCQs December 4, 2025September 28, 2024 by u930973931_answers 30 min Score: 0 Attempted: 0/30 Subscribe 1. Articulata is a class within which phylum? (A) Mollusca (B) Brachiopoda (C) Arthropoda (D) Echinodermata 2. Which feature distinguishes Articulata from Inarticulata? (A) Hinged shells (B) Presence of a lophophore (C) Soft body structure (D) Ability to swim 3. Articulata primarily inhabit which type of environment? (A) Terrestrial (B) Marine (C) Freshwater (D) All of the above 4. Which of the following is a characteristic feature of Articulata? (A) Unhinged shells (B) Presence of a foot (C) Two shells held together by teeth (D) Complex nervous system 5. The feeding mechanism of Articulata is mainly: (A) Suspension feeding (B) Predation (C) Herbivory (D) Parasitism 6. The shells of Articulata are typically made of: (A) Chitin (B) Organic material (C) Silica (D) Calcium carbonate 7. Which of the following is a common genus within the Articulata class? (A) Terebratalia (B) Lingula (C) Discinisca (D) Rhynchonella 8. Articulata are primarily known for their: (A) Ability to swim (B) Fossil record (C) Bright coloration (D) High mobility 9. Which structure do Articulata use for feeding? (A) Lophophore (B) Radula (C) Gills (D) Mandibles 10. What is the main function of the lophophore in Articulata? (A) Feeding (B) Reproduction (C) Gas exchange (D) Locomotion 11. Which of the following statements about Articulata is TRUE? (A) They are capable of active swimming. (B) They are mostly solitary organisms. (C) They have a well-developed foot. (D) They lack a circulatory system. 12. Articulata are often found buried in: (A) Sand (B) All of the above (C) Gravel (D) Mud 13. The reproduction in Articulata is primarily: (A) Asexual (B) Budding (C) Sexual (D) Fragmentation 14. The external shell of Articulata can be described as: (A) Calcareous and smooth (B) Thin and flexible (C) Thick and heavy (D) Organic and leathery 15. Articulata belong to which major group of marine animals? (A) Mollusks (B) Echinoderms (C) Lophophorates (D) Cnidarians 16. Which feature is NOT characteristic of Articulata? (A) Presence of a hinge (B) Soft body structure (C) Lack of complex eyes (D) Filter-feeding mechanism 17. The Articulata class is believed to have originated in which geological period? (A) Cambrian (B) Ordovician (C) Silurian (D) Devonian 18. Terebratalia, a well-known genus of Articulata, is often referred to as: (A) The sea cucumber (B) The marine worm (C) The bivalve (D) The living fossil 19. Articulata are primarily characterized by having: (A) A segmented body with multiple limbs (B) A simple unhinged shell with no distinct structure (C) A hardened body with jointed appendages (D) A calcified shell with intricate designs 20. The larval form of Articulata is called: (A) Veliger (B) Nauplius (C) Trochophore (D) Metanauplius 21. Which of the following best describes the habitat of Articulata? (A) Open ocean surface (B) Deep ocean trenches (C) Intertidal zones and shallow seas (D) Freshwater lakes 22. The shells of Articulata are usually: (A) Heavily ornamented (B) Rough and pitted (C) Smooth with a shiny surface (D) Transparent 23. Articulata reproduce by releasing eggs into the water, which are: (A) Fertilized internally (B) Self-fertilized (C) Fertilized externally (D) Not fertilized 24. What type of symmetry do Articulata exhibit? (A) Asymmetry (B) Bilateral symmetry (C) Radial symmetry (D) Pentaradial symmetry 25. The ecological role of Articulata primarily includes: (A) Acting as top predators (B) All of the above (C) Creating habitats for other organisms (D) Serving as prey for various marine species 26. Articulata can be identified by their: (A) Bright colors (B) Unique shell patterns (C) Soft bodies and unhinged shells (D) Presence of antennae 27. The ecological significance of Articulata includes their role as: (A) Indicators of environmental health (B) Primary producers (C) Both A and C (D) Major decomposers 28. Which of the following statements about Articulata is FALSE? (A) They have complex eyes. (B) They are primarily filter feeders. (C) They have a bilateral symmetry. (D) They are found in marine environments. 29. The shells of Articulata can be: (A) Thick and heavy (B) Thin and fragile (C) Rigid and non-calcified (D) All of the above 30. Which of the following is NOT a characteristic of Articulata? (A) They have a hard, calcified shell. (B) They exhibit bilateral symmetry. (C) They have a lophophore for feeding. (D) They possess a segmented body.