PHYLUM NEMATODA

PHYLUM NEMATODA

1.The larva of the Nereis is called the

a. Planula b. Miracidia c. Trochophore d. Cercaria

2. Leech collect the blood from the host with the help of

a. Jaws b. R. Teeth c. Salivary papillae d. Muscular pharynx

3. In earthworm the oviducts open to the outside on the segment .

a. 11 b. 12 c. 13 d. 14

4. Spermatheca in the earthworm open to the outside between the ... segments.

a. 6/7, 7/8, and 8/9 b. 7/8, 8/9 and 9/10 c. 6/7, 8/9 and 10/11 d. 8/9, 9/10and 10/11

5. Peristomium of Nereis is formed by the fusion of segments .

a. First two b. First three c. First four d. First five

6. Annuli in Annelid is only prevalent in

a. Earthworm b. Nereis c.Leech d. All the above

7. Parapodia in Nereis are used for

a. Locomotion b. Excretion c. Respiration d. ‘a’ and ‘c’

8. Nereis belongs to the class

a. Polychaeta b. Oligochaeta c. Hirudinaria d.Nemertinea

9. In Nereis, the setae are

a. Arranged in bundles b. Arranged singly c. Arranged in segmental rings

d. Found irregularly .

10. In earthworm and sand worm, the fertilization is

a. External b. Internal c. In the tube’s d. Unlike mentioned above

11. In earthworm, the blood is mainly collected by .... vessel and is reached to the dorsal vessel in

the posterior region

a. Ventral b. Subneural c. Oesophageal d. Parietal

12. Pick out the wrong statement. In Megascolex

a. Integumentary nephridium has nephridiopore but no nephrostoma

b. Meganephridium has nephrostome but no nephridiopore

c. Pharyngeal nephridium has neither nephrostoma nor nephridiopore

d. Only pharyngeal nephridium has a nephrostome and a nephridiopore

13.Select a false statement related to the circulatory system of earthworm

a. During circulation, blood gets oxygenated in the skin

b. Dorsal vessel distributes blood to various parts while the DE-oxygenated blood is collected

by ventral vessel

c. Dorsal vessel collects blood any ventral vessel distributes it

d. Haemoglobin is present in the plasma

14.In earthworm.
a. Both dorsal and ventral vessels are contractile and valvular

b. Both dorsal and ventral vessels are neither contractile nor valvular

c. Only dorsal vessel is contractile and valvular

d. Only ventral vessel is contractile and valvular

15.Respiration in earthworm is effected by

a. Specialised internal gills b. Fine tubular lungs c. Through a moist skin

d. Anaerobic

16. Nephridia in Megascolex are the

a. Meganephridia and micronephridia b. Meganephridia and pharyngeal nephridia

c. Micronephridia and pharyngeal nephridia

d. Micronephridia, meganephridia and pharyngeal nephridia

17. Units of excretion in earthworm is

a. Chloragogen cells b. Lateral hearts c. Cells in the epidermis d. Nephridia

18. A typical nephridia with the nephrostome and nephridiophore is the

a. Meganephridia and Megascolex b. Micronephridia of Megascolex

c. Pharyngeal nephridia of Lumbricus d. Metanephridia in Lumbricus

19.Entero-nephric nephridia are the .... in Megascolex.

a. Micronephridia b. Pharyngeal nephridia c. Meganephridia d. All the above

20.The so - called ‘lateral hearts’ of earthworm mainly serve to

a. Pump blood throughout the body b. Carry blood from dorsal to ventral vessel

c. Collect blood from all vessels of the body d. They do not perform any function

21.The meganephridia in Megascolex

a. Opens to exterior by the nephridiopore b. Opens only into the intestine

c. Meganephridia d. All the above

22.The function of dorsal pores in earthworm is

a. Respiration b. Excretion c. Exudation of body fluid d. All the above

23.In earthworm, the testes are enclosed in segments

a. 9 and 10 b. 8 and 9 c.10 and 12 d.10 and 11

24.In earthworm the photoreceptor cells (light sensitive cells) are abundant on the

a. Middle segment b. Last few segments c. Anterior and posterior segments

d. All the segments

25.Which one of the following is not an organ included in male genital system in earthworm ?

a. Seminal vesicle b. Prostate gland c. Testis sac d. Spermathec

26.The organ in earthworm which helps to glue the sperms together in aggregation is the

a. Prostate gland b. Spermatheca c. Seminal vesicle d. Vasa deferentia

27.Vasa deferentia opens to the outside on the .......... segment in earthworm.

a. 16 b. 17 c. 18 d. 19

28. Penial setae of earthworm are seen around the

a. Male genital opening b. Female genital opening c. Spermatheca d. Clitelium

29. Pick out the correct course of movement of sperms produced in the testes of earthworm.

a. Testes-coelom-seminal vesicles-coelom-seminal funnelvasa deferentia-outside

b .Testes - coelom- seminal vesicle-vasa deferentia-outside

c. Testes-coelom-spermatheca-coelom-seminal vesicle-vasa deferentia-outside

d. Testes-spermatheca-coelom-seminal vesicle-coelom-vasa deferentia-outside

30. The ciliated funnel of the meganephridia in earthworm is called

a. Nephridiopore b. Nephrostome c. Exonephric d. Endonephric

31. Seminal vesicles in earthworm occupies the ............ segments.

a. 9 & 12 b. 9 & 13 c. 8 & 11 d. 8 & 12

32. Locomotion in earthworm is effected by

a. Contraction of the circular muscle

b. Contraction of the longitudinal muscle c. Elongation of the longitudinal muscle

d. Alternate elongation and contraction of both longitudinal and circular muscle

33. In earthworm, the prostate glands are found on the segments.

a. 16 & 17 b. 17 & 18 c. 18 & 19 d. 19 & 20

34. ............. function like a nursery and storage for sperms in earth worms.

a. Spermatheca b. Seminal vesicle c. Coelomic cavity d. Prostate gland

35. Male genital opening and the penial setae of the earthworm are on the ... segments.

a. 15 b. 16 c. 17 d. 18

36.The female reproductive system consists of

a. Ovaries and oviducts b. Ovaries and Spermatheca

c. Ovaries, oviducts and Spermatheca d. Ovaries, oviducts, Spermatheca and pineal setae

37.Segments to earthworm which have no nephridia are

a. Anterior and posterior b. First three c. First five d. Last five

38.In earthworm, the spermatheca are used for

a. Development of ovum b. Development of sperm c. Storing of spermatozoa

d.Storing of ova

39.Internal opening is absent in ... in earthworm (Magascolex).

a. Meganephridia and Micronephridia b. Meganephridia and Pharyngeal nephridia

c. Micronephridia and Pharyngeal nephridia d. Micro, mega and Pharyngeal nephridia

40.Ciliated rosettes in earthworm are seen ............. on segments.

a. 9 & 10 b. 10 & 11 c. 11 & 12 d. 12 & 13

41........ is exonephric in earthworm.

a. Micronephridia b. Meganephridia c. Pharyngeal nephridia d. All the above

42....... are enaonephric in earthworm.

a. Micro and meganephridia b. Micro and pharyngeal nephridia

c. Mega and pharyngeal nephridia d. None of the above

43.CircumpharyngeaI connectives in the earthworm are those that connect the

a. Dorsal blood vessel with the ventral blood vessel

b. Suprapharyngeal ganglia with the subpharyngeal ganglia

c. Supra excretory canal with the sub excretory canal around the pharynx

d. Dorsal blood vessel with the ventral blood vessel around the pharynx

44.Sensory cells distributed on the epidermis of the earthworm is sensitive to

a. Light and touch b. Temperature and chemicals c. Moisture and vibrations d.All the above

45. One other medium which helps in excretion besides the nephridia in earthworm is

a. Epidermis b. Cuticle c. Cut d. Chloragogen cells

46.Lateral expansion of each segment in Nereis is called

a. Setae b. Pseudopodia c.Parapodia d.Ciliated foot

47. In Nereis, the prostomium is

a. The first segment b. The last segment c. The fused first and second segment

d. Not a true segment

48.The head of Nereis consits of

a. Prostomium b. Peristomium c. Prostomium and peristomium d. None of these

49.The last segment of Nereis is known as

a. Prostomium b. Peristomium c. Pygidium d. None of these

50.Notopodium and Neuropodium goes to form the ............ in Nereis.

a. Head b. Segment c. Parapodium d. Last segment


ANSWERS

1. c 2. d 3. d 4. a 5. a 6. c 7. d 8. a 9. a 10. a

11. b 12. d 13. b 14. c 15. c 16. d 17. d 18. d 19. c 20. b

21. b 22. c 23. d 24. c 25. d 26. a 27. c 28. a 29. a 30. b

31. a 32. d 33. c 34. b 35. d 36. c 37. a 38. c 39. c 40. b

41. a 42. c 43. c 44. d 45. d 46. c 47. d 48. c 49. c 50. c