Asteroidea MCQs January 8, 2026September 28, 2024 by u930973931_answers 30 min Score: 0 Attempted: 0/30 Subscribe 1. What is the common name for members of the class Asteroidea? (A) Sea urchins (B) Starfish (C) Sea cucumbers (D) Feather stars 2. What type of symmetry do adult Asteroidea exhibit? (A) Bilateral symmetry (B) Pentaradial symmetry (C) Asymmetry (D) Radial symmetry 3. What is the primary function of the tube feet in Asteroidea? (A) Respiration (B) Reproduction (C) Digestion (D) Locomotion and feeding 4. How do Asteroidea typically feed? (A) Through photosynthesis (B) Filter feeding (C) Absorbing nutrients through their skin (D) Predation, by eviscerating prey 5. Which of the following is a characteristic feature of Asteroidea? (A) A central disc and radiating arms (B) Tentacles (C) A hard shell (D) A segmented body 6. What is the main habitat of Asteroidea? (A) Freshwater (B) Terrestrial (C) Brackish water (D) Marine environments 7. Which structure do Asteroidea use for gas exchange? (A) Gills (B) Skin gills (C) Lungs (D) Book lungs 8. How do Asteroidea reproduce? (A) Sexual reproduction only (B) Asexual reproduction only (C) Both asexual and sexual reproduction (D) Budding only 9. What type of skeleton do Asteroidea possess? (A) Exoskeleton (B) Endoskeleton (C) Hydrostatic skeleton (D) Cartilaginous skeleton 10. Which of the following is a common predator of Asteroidea? (A) Fish (B) Sea turtles (C) Crustaceans (D) Larger starfish 11. What is the role of the madreporite in Asteroidea? (A) It aids in feeding. (B) It helps in respiration. (C) It regulates water pressure in the water vascular system. (D) It serves as a reproductive organ. 12. Which of the following is a defense mechanism of Asteroidea? (A) Bioluminescence (B) Production of toxins (C) Ejection of stomach contents (D) Camouflage 13. How many arms do most Asteroidea typically have? (A) Five (B) Four (C) Six (D) Eight 14. What is the purpose of the tube feet’s suction ability in Asteroidea? (A) To capture prey (B) To anchor to surfaces (C) To help in respiration (D) Both A and B 15. Which sensory structure is commonly found on the tips of Asteroidea’s arms? (A) Chemoreceptors (B) Antennae (C) Eyespots (D) Tentacles 16. What is the main diet of most Asteroidea species? (A) Algae (B) Coral (C) Bivalves and other invertebrates (D) Plankton 17. What do Asteroidea use to regenerate lost arms? (A) Stem cells (B) Hormones (C) Specialized regeneration cells (D) Tissue differentiation 18. How do Asteroidea contribute to marine ecosystems? (A) By preying on bivalves, they help control their populations. (B) By being a primary producer (C) By competing with fish for food (D) By serving as a food source for other predators 19. Which Asteroidea species is known for its ability to consume coral? (A) Blue starfish (B) Sunflower starfish (C) Crown-of-thorns starfish (D) Chocolate chip starfish 20. What kind of locomotion do Asteroidea primarily use? (A) Swimming (B) Flying (C) Burrowing (D) Crawling 21. How do Asteroidea typically detect their environment? (A) Through smell (B) Through taste (C) Through touch and light-sensitive cells (D) Through sight 22. What is the common reproductive strategy of Asteroidea? (A) Internal fertilization (B) External fertilization (C) Asexual budding (D) Parthenogenesis 23. Which of the following describes the feeding process of Asteroidea? (A) They absorb nutrients directly through their skin. (B) They consume prey whole without digestion. (C) They have specialized jaws to chew food. (D) They digest food externally before ingestion. 24. What is the ecological significance of Asteroidea? (A) They provide habitat for smaller organisms. (B) They help recycle nutrients in marine ecosystems. (C) They are key predators in their environment. (D) All of the above 25. How do Asteroidea respond to threats in their environment? (A) By swimming away (B) By hiding in crevices (C) By expelling toxins (D) By releasing camouflage 26. What type of circulatory system do Asteroidea have? (A) Open circulatory system (B) Closed circulatory system (C) Water vascular system (D) No circulatory system 27. Which of the following Asteroidea species is known for its vibrant colors? (A) All of the above (B) Green sea star (C) Blue starfish (D) Crown-of-thorns starfish 28. What is a key characteristic of the water vascular system in Asteroidea? (A) It circulates blood. (B) It helps with gas exchange. (C) It is used for reproduction. (D) It aids in movement and feeding. 29. What role do Asteroidea play in coral reef ecosystems? (A) They act as herbivores. (B) They help maintain balance by preying on coral competitors. (C) They provide shelter for other marine life. (D) They are apex predators. 30. Which class of echinoderms does Asteroidea belong to? (A) Crinoidea (B) Echinoidea (C) Ophiuroidea (D) Echinodermata