Acoela MCQS December 4, 2025September 28, 2024 by u930973931_answers 30 min Score: 0 Attempted: 0/30 Subscribe 1. Acoela belong to which phylum? (A) Acoelomorpha (B) Annelida (C) Nematoda (D) Mollusca 2. The body structure of Acoela is primarily characterized by being: (A) Segmented (B) Coelomate (C) Cylindrical (D) Flat and unsegmented 3. Acoela are predominantly found in which type of habitat? (A) Freshwater (B) Terrestrial (C) Aerial (D) Marine 4. The primary mode of reproduction in Acoela is: (A) Asexual (B) Budding (C) Sexual (D) Binary fission 5. Acoela possess which of the following features? (A) True coelom (B) Protosomes (C) Simple nervous system (D) Complex respiratory system 6. Acoela are primarily: (A) Carnivorous (B) Herbivorous (C) Autotrophic (D) Saprophytic 7. The body of Acoela is covered with: (A) Scales (B) Ciliated epidermis (C) A tough exoskeleton (D) A thick cuticle 8. The main feeding structure of Acoela is known as the: (A) Proboscis (B) Mouth (C) Pharynx (D) Tentacle 9. The larval stage of Acoela is called: (A) Ciliated larva (B) Planula (C) Zygote (D) Trochophore 10. Acoela have a simple body plan that lacks: (A) A nervous system (B) A true coelom (C) A digestive system (D) Muscle tissue 11. The excretory system of Acoela is primarily: (A) Kidney-based (B) Malpighian tubules (C) Simple diffusion (D) Protonephridial 12. The evolutionary significance of Acoela is primarily in their: (A) Complexity (B) Size (C) Segmentation (D) Primitive features 13. Acoela can regenerate lost body parts, which is a feature of: (A) High metabolic rate (B) Regenerative capabilities (C) Asexual reproduction (D) Symbiosis 14. Acoela have a body that is typically: (A) Cylindrical (B) Round (C) Flattened (D) Elongated 15. The locomotion of Acoela is primarily facilitated by: (A) Muscles (B) Flagella (C) Cilia (D) Tentacles 16. Acoela can be differentiated from other flatworms by their: (A) Lack of an anus (B) Body shape (C) Presence of a coelom (D) Sexual reproduction 17. The typical size of Acoela ranges from: (A) 0.5 mm to 5 mm (B) 1 mm to 10 cm (C) 5 mm to 20 cm (D) 1 cm to 1 m 18. The primary ecological role of Acoela is as: (A) Parasites (B) Decomposers (C) Predators (D) Primary producers 19. Acoela can be found in which of the following environments? (A) Freshwater only (B) Marine only (C) Both freshwater and marine (D) Terrestrial environments only 20. The nervous system of Acoela is: (A) Well developed with a brain (B) Absent (C) Complex and segmented (D) Simple and diffuse 21. Acoela can be identified by their unique reproductive structure known as: (A) Copulatory organs (B) Testes (C) Ovaries (D) Cloaca 22. The body wall of Acoela contains: (A) Epithelial cells and muscle layers (B) Only muscle layers (C) A chitinous layer (D) No muscle layers 23. Acoela are primarily important for studies in: (A) Marine biology (B) All of the above (C) Environmental science (D) Evolutionary biology 24. The digestive system of Acoela is characterized by: (A) A complete digestive tract (B) Absence of a digestive system (C) A simple sac-like structure (D) A complex stomach 25. The ecological role of Acoela includes: (A) Nutrient cycling (B) All of the above (C) Food for other organisms (D) Parasite regulation 26. Acoela's body is predominantly composed of: (A) Mesoderm (B) Coelomic fluid (C) Ectoderm and endoderm (D) Cartilage 27. The primary mode of locomotion in Acoela involves: (A) Jet propulsion (B) Crawling with appendages (C) Swimming with fins (D) Gliding on cilia 28. The habitat of Acoela can often be described as: (A) Open ocean (B) All of the above (C) Rocky intertidal zones (D) Sandy or muddy substrates 29. Acoela have a relatively high capacity for: (A) Regeneration (B) Metabolism (C) Osmoregulation (D) Growth 30. Research on Acoela contributes to our understanding of: (A) All of the above (B) Marine ecosystems (C) Evolutionary relationships (D) Developmental biology