1. Which level of organisation is characteristic of poriferans (sponges)?

2. Diploblastic animals have how many germ layers?

3. Which symmetry is shown by echinoderms in adult stage?

4. Acoelomate animals lack which of the following?

5. Pseudocoelom differs from true coelom because pseudocoelom is

6. Which phylum exhibits segmentation (metamerism)?

7. Which structure is characteristic of cnidarians for capturing prey?

8. Which phylum is known for the presence of a water vascular system?

9. Which phylum includes animals with jointed appendages and exoskeleton made of chitin?

10. The radula is a feeding organ characteristic of which phylum?

11. Which of the following is a primary characteristic of chordates?

12. Which of these phyla has members that are mostly parasitic with complex life cycles?

13. In which phylum are flame cells involved in osmoregulation and excretion?

14. Which phylum includes animals with a closed circulatory system and nephridia?

15. Which class of vertebrates is characterised by feathers and hollow bones?

16. Which of the following is NOT a characteristic of mammals?

17. Which phylum has an exoskeleton that must be moulted for growth (ecdysis)?

18. Which phylum shows metameric segmentation with tagmatization (grouping of segments)?

19. Which characteristic distinguishes chordates from non-chordates?

20. Which phylum contains animals with tube feet operated by a water vascular system?

21. Which body cavity type is present in annelids and molluscs respectively?

22. Which feature is common to all members of phylum Arthropoda?

23. Which phylum includes animals with a triploblastic, acoelomate body plan?

24. Which phylum is considered the simplest multicellular animals with pores and choanocytes?

25. Which of these represents an adaptive advantage of segmentation (metamerism)?

26. Which group shows alternation of generations prominently including a dominant diploid sporophyte and reduced gametophyte? (in seed-bearing animals analogy: think of dominance of life stages)

27. Which taxonomic character is most important at higher levels (phylum) of animal classification?

28. Which feature is diagnostic of phylum Chordata at some stage of life?

29. Which group's larvae are often planktonic and bilateral while adults are sessile and radial (example: starfish larvae vs adults)?

30. Which statement about animal classification in NCERT is correct?