Phylum Platyhelminthes MCQs December 5, 2025September 28, 2024 by u930973931_answers 30 min Score: 0 Attempted: 0/30 Subscribe 1. Platyhelminthes are commonly known as: (A) Roundworms (B) Flatworms (C) Segmented worms (D) Marine worms 2. A characteristic feature of Platyhelminthes is: (A) Body segmentation (B) Coelom presence (C) Exoskeleton (D) Bilateral symmetry 3. Platyhelminthes belong to which phylum? (A) Annelida (B) Nematoda (C) Platyhelminthes (D) Cnidaria 4. Which class includes parasitic Platyhelminthes? (A) Turbellaria (B) Monogenea (C) Cestoda (D) Trematoda 5. The body of Platyhelminthes is primarily composed of: (A) Endoderm and ectoderm (B) Mesoderm and ectoderm (C) Ectoderm only (D) Mesoderm, ectoderm, and endoderm 6. The primary habitat of most Platyhelminthes is: (A) Terrestrial (B) Freshwater (C) All of the above (D) Marine 7. Tapeworms belong to which class? (A) Cestoda (B) Trematoda (C) Turbellaria (D) Monogenea 8. Platyhelminthes lack which system? (A) Digestive system (B) Circulatory system (C) Nervous system (D) Reproductive system 9. Structure used for locomotion in many Platyhelminthes is: (A) Pseudopodia (B) Muscles (C) Tentacles (D) Cilia 10. An example of a free-living Platyhelminth is: (A) Schistosoma (B) Taenia (C) Fasciola (D) Planaria 11. The excretory system of Platyhelminthes functions via: (A) Kidneys (B) Flame cells (C) Gills (D) Lungs 12. Platyhelminthes reproduce by: (A) Asexual budding (B) Sexual reproduction (C) All of the above (D) Binary fission 13. The head region of Platyhelminthes is called: (A) Auricle (B) Cephalothorax (C) Planaria (D) Proglottid 14. Platyhelminthes have which type of digestive system? (A) Gastrovascular cavity (B) Complete digestive system (C) No digestive system (D) Alimentary canal 15. “Dorsal-ventral flattening” refers to: (A) Reproductive system (B) Body shape (C) Feeding habits (D) Habitat 16. Nutrient absorption in Platyhelminthes occurs via: (A) Proglottids (B) Setae (C) Flame cells (D) Microvilli 17. Trematodes can cause which disease? (A) Cysticercosis (B) Tapeworm infection (C) Schistosomiasis (D) Liver fluke disease 18. The larval stage of some Platyhelminthes includes: (A) Miracidium (B) Cercaria (C) Metacercaria (D) All of the above 19. Characteristic of Cestoda is: (A) Well-developed digestive system (B) Hooks and suckers (C) Primarily free-living (D) Cilia on body surface 20. Platyhelminthes are: (A) Coelomates (B) Pseudocoelomates (C) Acoelomates (D) Eucoelomates 21. Which is NOT a function of the Platyhelminthes nervous system? (A) Movement coordination (B) Excretion (C) Sensory reception (D) Response to stimuli 22. Life cycle of many Platyhelminthes involves: (A) Single host (B) Multiple hosts (C) No hosts (D) Terrestrial life 23. The scolex is a structure found in: (A) Turbellaria (B) Trematoda (C) Monogenea (D) Cestoda 24. Which organs are absent in Platyhelminthes? (A) Eyes (B) Mouth (C) Gills (D) Tentacles 25. Main function of the tegument in parasitic Platyhelminthes is: (A) Protection from host immunity (B) Digestion (C) Locomotion (D) Respiration 26. Symmetry exhibited by Platyhelminthes is: (A) Radial symmetry (B) No symmetry (C) Asymmetry (D) Bilateral symmetry 27. Type of body cavity in Platyhelminthes is: (A) Coelom (B) Pseudocoel (C) No true body cavity (D) Hemocoel 28. Fish ectoparasites belong to which Platyhelminth class? (A) Trematoda (B) Cestoda (C) Turbellaria (D) Monogenea 29. Typical Platyhelminth body structure is: (A) Cylindrical and segmented (B) Spherical (C) Cubical (D) Flattened and elongated 30. Primary locomotion in Platyhelminthes is by: (A) Ciliary movement (B) Jet propulsion (C) Swimming with fins (D) Crawling with appendages