Chondrichthyes MCQs January 8, 2026September 28, 2024 by u930973931_answers 30 min Score: 0 Attempted: 0/30 Subscribe 1. What is the primary characteristic of Chondrichthyes? (A) They have bony skeletons (B) They possess lungs (C) They are warm-blooded (D) They have cartilaginous skeletons 2. Which of the following animals belongs to the class Chondrichthyes? (A) Salmon (B) Catfish (C) Goldfish (D) Shark 3. What type of fins do most Chondrichthyes possess? (A) Lobed fins (B) Paired fins (C) Filamentous fins (D) Adipose fins 4. Which of the following is a subclass of Chondrichthyes? (A) Elasmobranchii (B) Actinopterygii (C) Agnatha (D) Amphibia 5. How do Chondrichthyes primarily breathe? (A) Through lungs (B) Through skin (C) Through gills (D) Through swim bladders 6. Which of the following is NOT a characteristic of Chondrichthyes? (A) Scales (B) Jaws (C) Cartilaginous skeleton (D) Swim bladder 7. What is the primary diet of many Chondrichthyes? (A) Herbivorous (B) Carnivorous (C) Omnivorous (D) Parasitic 8. Which of the following is a known adaptation of sharks? (A) Ability to fly (B) Colorful patterns (C) Strong sense of smell only (D) Lateral line system 9. What type of reproduction do many Chondrichthyes exhibit? (A) Oviparous (B) All of the above (C) Ovoviviparous (D) Viviparous 10. What organ in Chondrichthyes helps in buoyancy control? (A) Swim bladder (B) Gills (C) Liver (D) Heart 11. Which of the following is a feature of rays, a type of Chondrichthyes? (A) Flattened bodies (B) Long, slender bodies (C) Smooth skin (D) Large dorsal fins 12. What is the main function of the ampullae of Lorenzini in Chondrichthyes? (A) Detecting light (B) Detecting temperature (C) Detecting sound (D) Detecting electric fields 13. Which of the following is a method sharks use to hunt? (A) Hunting in packs (B) Camouflage (C) Ambush (D) All of the above 14. What is the typical body shape of most Chondrichthyes? (A) Torpedo-shaped (B) Flat (C) Cylindrical (D) Boxy 15. Which of the following structures are found in Chondrichthyes? (A) Hair (B) Scales (C) Feathers (D) None of the above 16. What is the main feeding strategy of filter-feeding Chondrichthyes? (A) Grazing on plants (B) Straining plankton from water (C) Sucking small fish (D) Hunting larger prey 17. How many gill slits do most sharks have? (A) 2 (B) 10 (C) 5 to 7 (D) 12 18. What is a common behavior observed in Chondrichthyes during mating? (A) They form schools (B) They migrate to freshwater (C) They engage in courtship displays (D) They become solitary 19. Which of the following statements about shark teeth is true? (A) Sharks have only one set of teeth in their lifetime (B) Shark teeth are fused to the jaw (C) Sharks can replace their teeth multiple times (D) Shark teeth are not sharp 20. What role do Chondrichthyes play in their ecosystems? (A) They are primary producers (B) They have no ecological role (C) They are decomposers (D) They are top predators 21. Which of the following is a well-known species of ray? (A) Manta ray (B) Great white shark (C) Hammerhead shark (D) Tiger shark 22. What adaptation allows some Chondrichthyes to detect vibrations in water? (A) Lateral line system (B) Eyes (C) Ampullae of Lorenzini (D) Gill slits 23. What is the typical lifespan of many Chondrichthyes species? (A) 5-10 years (B) 50-100 years (C) 30-50 years (D) 15-30 years 24. Which of the following is an example of a filter-feeding Chondrichthyes? (A) Great white shark (B) Bull shark (C) Whale shark (D) Mako shark 25. How do Chondrichthyes maintain their position in the water column? (A) By manipulating body fluids (B) Using swim bladders (C) By swimming constantly (D) By floating on the surface 26. Which of the following statements about the reproduction of Chondrichthyes is true? (A) All Chondrichthyes are oviparous (B) They all give birth to live young (C) They reproduce only in freshwater (D) They have diverse reproductive strategies 27. What adaptation do many Chondrichthyes have for hunting in low-light conditions? (A) Enhanced sense of smell (B) Ability to see in color (C) Enhanced sense of hearing (D) Bioluminescence 28. Which of the following is a major threat to Chondrichthyes populations? (A) Overfishing (B) Habitat destruction (C) Pollution (D) All of the above 29. What is the primary method of locomotion for Chondrichthyes? (A) Crawling (B) Jumping (C) Swimming (D) Gliding 30. Which of the following best describes the skin of Chondrichthyes? (A) Smooth and hairless (B) Covered in feathers (C) Rough with dermal denticles (D) Scaly like reptiles