animal kingdom

NEET QUESTION TRUE (T) OR FALSE (F)

1.Spongilla belongs to a group of animals, which are best described as multicellular organisms with water vascular system.

2.The adult porifers are radially symmetrical but its larvae are bilaterally symmetrical.

3.The digestive system in Teenia has two openings that serve as mouth and anus respectively and hence known to possess complete digestive system.

4. In canidarians exhibiting metagenesis, polyps produce medusac sexually and medusac from the polyps asexually.

5. Choanocytes containthe stinging capsules or nematocysts present on the tentacles and the body of coelenterates.

6. Adamsia is characterized by intracellular digestion without gstro- vascular cavity with a single opening called hypostome.

7. In Pinctada the blood is ciculated through a series of vessels of varying diameters including capilliaries.

8. An undifferentiated layer, mesohyl, is present in between the ectoderm and the endoderm of Ctenoplane.

9. When any plane passes through the central axis of the body of coelenterates, ctenophores and adult echinoderms, it divides these organisms into two identical halves.

10. Ascaris is a pseudocoelomate, in which nody cavity is not lined by mesoderm, instead, the mesoderm is present as scattered pouches in between the endoderm and ectoderm.

11. In some animals, the body is externally and internally divided into segments with a serial repetition of at least some organs.

12. Notochord is an ectodermally derived rigid rod-like structure oformed on the ventral side during embryonic development in chordates.

13. The body of cockroach is covered by chtinous exoskeleton, have jointed appendages and possess Malpighian tubules for excretion.

14.Body of animals belonging to second largest phylum of animal kigdom os segmented withdistnct head, muscular foot and visceral hump.

15. Longitudinal and circular muscles in leeches, help in locomotion.

16. The mouth iof pila contains s file-like rasping organ for respiration, called radula.

17. The space between mantie and calcareous shell is called the mantile cavity in which gills are present for respiration in molluscs.

18. The body of Pleurobracchia eight pairs of external rows of ciliated combplates for locomotion.

19. Roundworms have organ level of body organisation with well-developed muscular pharynx in alimentary canal.

20. The property of living organism toemit light is called bioluminescence and is well marked in ctenophores.

21. In Ascaris, an excretory tube removes body wastes from the body cavity through the excretory pore.

22. Hooks and suckers are present in parasitic forms lke Fasciola, possessing high regeneration capacity.

23. Cyclostomes are marine but migrate for spawning to freshwater and die within a few days of it,followed by metamorphosis of larvae in fresh water.

24. Some of the vertebrates that do not possess jaws belong to the phylum Agnatha and represented by the class Cyclostomata.

25. Chordates are fundamentally characterised by the presence of mesodermal notochord, ventral, solid and double nerve cord and paired pharyngeal gill slits.

26. The elongated body of cyclostomes is devoid of scales and paired fins, have a sucking and circular mouth without jaws.

27. Bombyx, locusta and Apis are economically beneficial insects belonging to the largest phylum of kingdom Animalia.

28. Hemichordates are worm- like marine animals exhibiting segmented cylindrical body with proboscis, collar and trunk and closed circulatory system.

29. The adult echinoderm are radially symmetrical but their larvae are bilaterally sysymmetrical.

30. Jelly fish, cuttle fish and devil fish are aquatic organism having an organ-system level of organisation.

31. The most distinctive feature of spiny bodied, exclusively marine echinoderms is the presence of water vascular system.

32. Body of Octopus is covered by a chitinous shell and is bilaterally symmetrical.

ANSWER

1. (F) 2. (F) 3. (F) 4. (F) 5. (F) 6. (F) 7. (F) 8. (F) 9. (T) 10. (T)

11. (T) 12. (F) 13.. (T) 14. (F) 15. (T) 16. (F) 17. (F) 18. (F) 19. (F) 20. (T)

21. (T) 22. (F) 23. (T) 24. (F) 25. (F) 26. (T) 27. (F) 28. (F) 29. (T) 30. (F)

31. (T) 32. (F)

QUOTE:- “THINK BEFORE YOU SPEAK, SHARP WORDS CAN HURT YOU MORE THAN ANYONE ELSE.”