Phylum Cnidaria MCQs

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1. What is the defining characteristic of the phylum Cnidaria?





2. Which of the following is NOT a class within the phylum Cnidaria?





3. What type of body symmetry do cnidarians exhibit?





4. Which structure in cnidarians is used for capturing prey?





5. In which form do jellyfish primarily exist?





6. Which class of Cnidaria includes sea anemones and corals?





7. The life cycle of a jellyfish typically alternates between which two forms?





8. Which of the following is a common habitat for Cnidarians?





9. What type of digestion occurs in cnidarians?





10. Which of the following organisms is classified as a hydrozoan?





11. What is the role of the mesoglea in cnidarians?





12. Which type of Cnidarian is known for its box-shaped medusa?





13. Corals form symbiotic relationships with which type of algae?





14. Which of the following is a characteristic feature of the class Scyphozoa?





15. What kind of reproductive strategy is commonly observed in Cnidarians?





16. What structure is responsible for the locomotion of medusa forms?





17. In Cnidarians, which structure serves as the mouth and anus?





18. Which class of Cnidarians is known for its colonial lifestyle?





19. What is the main function of the tentacles in Cnidarians?





20. Which of the following statements about coral reefs is true?





21. What is a common feature of the class Anthozoa?





22. Which Cnidarian is known for its powerful sting and is often found in warm waters?





23. Which type of reproduction involves the formation of a polyp from a planula larva?





24. What is the primary purpose of the nematocysts found in Cnidarians?





25. What form does a hydra predominantly exist in?





26. Which class of Cnidaria is primarily composed of small, freshwater species?





27. Which of the following structures is used for locomotion in some jellyfish?





28. Which type of organism is typically found in the class Hydrozoa?





29. What is the habitat of most Cnidarians?





30. What is the role of the gastrovascular cavity in cnidarians?





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