Gymnolaemata MCQs December 4, 2025September 28, 2024 by u930973931_answers 30 min Score: 0 Attempted: 0/30 Subscribe 1. Gymnolaemata is a class within which phylum? (A) Mollusca (B) Bryozoa (C) Arthropoda (D) Cnidaria 2. What is the primary habitat of Gymnolaemata? (A) Terrestrial (B) Freshwater (C) Marine (D) Both freshwater and marine 3. Gymnolaemata are commonly referred to as: (A) Moss animals (B) Sea mats (C) Coral (D) Anemones 4. The body of Gymnolaemata consists of: (A) A colony of interconnected zooids (B) A single polyp (C) A segmented body (D) A soft body without a skeleton 5. The exoskeleton of Gymnolaemata is primarily made of: (A) Calcium carbonate (B) Chitin (C) Silica (D) Protein 6. Gymnolaemata reproduce primarily through: (A) Asexual reproduction (B) Budding (C) Sexual reproduction (D) Fragmentation 7. Which structure do Gymnolaemata use for feeding? (A) Lophophore (B) Tentacles (C) Radula (D) Gills 8. The zooids of Gymnolaemata are usually: (A) Free-living (B) Sessile (C) Mobile (D) Parasitic 9. What is the main function of the lophophore in Gymnolaemata? (A) Feeding (B) Respiration (C) Locomotion (D) Reproduction 10. Gymnolaemata can often be found: (A) Inside other organisms (B) Floating freely in water (C) Buried in sand (D) Attached to hard substrates 11. Which of the following is a characteristic of Gymnolaemata? (A) Formation of a branched colony (B) Body divided into segments (C) Presence of a shell (D) Lack of a circulatory system 12. The zooids in Gymnolaemata can be specialized for different functions. Which type is involved in reproduction? (A) Feeding zooids (B) Reproductive zooids (C) Immune zooids (D) Defensive zooids 13. Gymnolaemata are classified as: (A) Non-bilaterians (B) Deuterostomes (C) Protostomes (D) Coelomates 14. The primary method of locomotion in Gymnolaemata is through: (A) Jet propulsion (B) Ciliary movement (C) Flagella (D) Muscular contraction 15. Which of the following statements about Gymnolaemata is TRUE? (A) They are primarily solitary organisms (B) They have complex nervous systems (C) They possess a hard outer covering (D) They can swim actively 16. The larval stage of Gymnolaemata is called: (A) Planula (B) Brachiopod (C) Cercaria (D) Cyphonautes 17. Gymnolaemata are important in marine ecosystems because they: (A) Compete with fish for food (B) Provide habitats for other organisms (C) Act as primary producers (D) Are top predators 18. Which of the following best describes the structure of Gymnolaemata? (A) A single, solid mass (B) A colony of interconnected individuals (C) A simple polyp structure (D) A segmented body with limbs 19. Gymnolaemata are known to produce which type of skeleton? (A) Cartilaginous skeleton (B) Endoskeleton (C) Hydrostatic skeleton (D) Exoskeleton 20. The presence of a lophophore allows Gymnolaemata to: (A) Filter feed (B) Actively hunt prey (C) Swim efficiently (D) Store nutrients 21. Which class is NOT a part of the phylum Bryozoa? (A) Hexapoda (B) Phylactolaemata (C) Stenolaemata (D) Gymnolaemata 22. The zooids in a Gymnolaemata colony are connected by: (A) A network of coelomic canals (B) Chitinous tubes (C) Soft tissues (D) Muscle fibers 23. Which of the following is an example of a Gymnolaemata species? (A) Lingula (B) Bugula (C) Nautilus (D) Octopus 24. The exoskeleton of Gymnolaemata serves primarily to: (A) Protect the soft body (B) Aid in locomotion (C) Store energy (D) Facilitate reproduction 25. Gymnolaemata colonies can be: (A) Free-floating (B) Buried in sediment (C) Attached to hard surfaces (D) All of the above 26. The reproductive structures in Gymnolaemata are known as: (A) Gonopores (B) Statoblasts (C) Oocytes (D) Zygotes 27. Which of the following is a mode of asexual reproduction in Gymnolaemata? (A) Budding (B) Fission (C) Gemmulation (D) Both A and C 28. The water circulation in the colony of Gymnolaemata is facilitated by: (A) Pumping organs (B) Muscular contractions (C) Gas diffusion (D) Ciliary action 29. Which of the following is a key ecological role of Gymnolaemata? (A) Algae control (B) Nutrient recycling (C) Habitat formation (D) Pest control 30. The diversity of Gymnolaemata is important for: (A) All of the above (B) Coral reef health (C) Water filtration (D) Biodiversity in marine ecosystems