Diversity Among Animals MCQs PDF | Biology Class 11 Chapter 9 MCQs

1. Animals that lack a backbone are called:

2. The phylum with organisms having radial symmetry is:

3. Which phylum includes sponges?

4. Animals that show bilateral symmetry first appear in:

5. Which of the following is a characteristic of vertebrates?

6. The simplest animal phylum is:

7. Jellyfish belong to which class?

8. Animals with three germ layers are called:

9. Which of these possesses an exoskeleton?

10. Acoelomates lack:

11. Poriferans feed by:

12. Spicules in sponges are made of:

13. Cnidocytes are found in:

14. The stinging structures in Hydra are called:

15. Hydra belongs to class:

16. Sea anemones lack a:

17. Polyp form in Cnidaria is:

18. Sponges are:

19. Which is NOT a Poriferan structure?

20. Cnidarians are primarily found in:

21. Flatworms belong to phylum:

22. Planaria is a:

23. Tapeworms are:

24. Nematodes have:

25. Ascaris is an example of:

26. Flatworms exhibit:

27. The body cavity of nematodes is:

28. Tapeworms are commonly found in:

29. Planaria can regenerate because of:

30. Nematodes are important decomposers in:

31. Earthworms belong to phylum:

32. Segmentation is prominent in:

33. Octopus belongs to class:

34. The radula is a feeding structure in:

35. Annelids have:

36. The mantle is found in:

37. Leeches are used in medicine for:

38. The class with two shells is:

39. Earthworms help in:

40. The foot in mollusks is mainly used for:

41. Arthropoda means:

42. The largest phylum in the animal kingdom is:

43. Exoskeleton of arthropods is made of:

44. Insects have:

45. Crustaceans are mainly found in:

46. Spiders belong to class:

47. Centipedes have:

48. Insects breathe through:

49. Bees are important for:

50. The body of arthropods is divided into segments called:

51. Sea stars belong to phylum:

52. Echinoderms exhibit:

53. Water vascular system is used for:

54. Tube feet are characteristic of:

55. Sea urchins have:

56. Echinoderms are mainly:

57. The madreporite helps in:

58. Brittle stars differ from sea stars by:

59. Sea cucumbers have:

60. Echinoderms possess:

61. Notochord is first seen in:

62. Tunicates are:

63. Vertebral column replaces notochord in:

Class XI Biology MCQs