Phylum - Coelentrata MCQ Solved Paper for SBI PO

1. The tentacles of Hydra are
A. pinnate
B. hollow
C. solid
D. frilled
Answer : B

2. Strobilization is the characteristic feature of
A. Aurelia
B. Hydra
C. Metridium
D. Physalia
Answer : A

3. Hydra respires through
A. mesoglea
B. general surface
C. pellicle
D. gastrodermis
Answer : B

4. If nematocysts are absent in Hydra, which is affected
A. Locomotion
B. Predation
C. Both (a) and (b)
D. Reproduction
Answer : C

5. Tentacles of Hydra help in
A. locomotion
B. food capturing
C. locomotion and food capturing
D. respiration
Answer : C

6. Coral reef formation is mainly related to
A. sponges
B. anthozoans
C. molluscs
D. hydrozoans
Answer : B

7. The mesoglea in Hydra is traversed by
A. sensory cells
B. nerve cells
C. interstitial cells
D. all of these
Answer : A

8. Body wall of coelentrates is described as
A. diploblastic
B. integument
C. multicellular
D. triploblastic
Answer : A

9. Polymorphic coelentrates are the members of the class
A. hydrozoa
B. scyphozoa
C. actinozoa
D. all of these
Answer : A

10. The testes of hydra are located
A. below the ovaries
B. below the tentacles
C. further down the tentacles to occupy central position of the body
D. anywhere on the body between tentacles and adhesive disc
Answer : B

11. In Hydra, the physiological division of labour is exhibited by
A. cellular layers
B. tissues
C. cell differentiation
D. organs
Answer : C

12. In Hydra, the nematocysts are abundant on
A. upper part
B. middle part
C. tentacles
D. lower part
Answer : C

13. Coelenteron of Hydra serves the double purpose of
A. digestion and circulation
B. digestion and storage
C. excretion and locomotion
D. circulation and storage
Answer : A

14. In Hydra, the gastrodermis is composed of
A. musculo-epithelial cells
B. musculo-nutritive cells
C. sensory cells
D. cniboblasts
Answer : B

15. The flagella of food-absorbing cells in hydra aid in
A. stirring up the digestive fluid in the digestive cavity
B. engulfing food particles
C. engulfing semi-digested particles inside food- absorbing cells
D. none of these
Answer : A

16. Rhopalia are the sense organs in medusa belonging to the class
A. hydrozoa
B. scyphozoa
C. actinozoa
D. all of these
Answer : B

17. Which of the following tissue is absent in Hydra ?
A. Connective tissue
B. Epithelial tissue
C. Muscular tissue
D. Nervous tissue
Answer : A

18. Green Hydra is
A. Hydra vulgaris
B. Chlorohydra viridisma
C. Hydra oligaetis
D. None of these
Answer : B

19. Nutritionally Hydra is
A. saprozoic
B. herbivorous
C. insectivorous
D. carnivorous
Answer : D

20. Musculo-glandular cells are found in hydra
A. on the tentacles
B. on the hypostome
C. on the basal disc
D. in the gastrodermis
Answer : C

21. If a Hydra is cut into two pieces, it is noted that
A. both parts die
B. both parts make up the loss and form two new individuals
C. both parts live independently as they are
D. none of these
Answer : B

22. Hydra reproduces by budding when
A. plenty of food is present
B. pond is going dry
C. Hydra is alone
D. water becomes muddy
Answer : A

23. In jelly fishes, the adult is always
A. polypoid
B. medusoid
C. polymorphic
D. hydroid
Answer : B

24. The mesoglea present in Hydra in between epidermis and gastrodermis is
A. non-cellular and jelly like material
B. cellular jelly like material containing sensory cells
C. cellular jelly like material containing nerve cells
D. both (a) and (c)
Answer : A

25. A Hydra usually possess
A. single testis and many ovaries
B. single ovary and many testes
C. one testis and one ovary
D. many testes and many ovaries
Answer : B

26. In Hydra, the absence of circulatory system is fulfilled by
A. ectoderm
B. endoderm
C. mesoglea
D. coelenteron
Answer : D

27. A hydranth is
A. Blastostyle of Obelia
B. Gonad of Hydra
C. Medusa of Obelia
D. Polyp of Obelia
Answer : D

28. Hydra responds to a strong mechanical stimulus such as agitating the surface of water by
A. somersaulting
B. contracting a part or whole of its body
C. walking away
D. looping
Answer : B

29. Hydra is
A. marine, radial, symmetrical and diploblastic
B. fresh water, biradial, symmetrical and triploblastic
C. fresh water, radial, symmetrical and diploblastic
D. marine, radial, symmetrical and triploblastic
Answer : C

30. Hydra is negatively chemotropic because it
A. prefers weak light
B. moves away from strong light
C. avoids chlorinated water
D. moves to water of low temperature
Answer : C

31. What structures in Hydra functionally correspond to the pseudopodia of Aamoeba ?
A. Endodermal cells
B. Mouth
C. Nematocysts
D. Tentacles
Answer : D

32. Ctenophores generally exhibit
A. bilateral symmetry
B. radial symmetry
C. asymmetry
D. spherical symmetry
Answer : A

33. The body wall of Hydra consists of
A. ecotderm and endoderm
B. ectoderm and mesoderm
C. ectoderm, mesoderm and endoderm
D. epidermis, mesoglea and endoderm
Answer : B

34. The body of Hydra is
A. asymmetrical
B. bilaterally symmetrical
C. radially symmetrical
D. irregular
Answer : C

35. A chitinous material is present in the
A. coenosarc of Obelia
B. perisarc of Obelia
C. body wall of Sea anemone
D. umbrella of Aurelia
Answer : B

36. Tentaculocysts in Obelia are meant for
A. locomotion
B. balancing
C. swimming
D. reproduction
Answer : B

37. The poisonous fluid present in the nematocysts of Hydra is
A. toxin
B. venom
C. hypnotoxin
D. haematin
Answer : C

38. The nematocysts develop from
A. musculo-epithelial cells
B. interstitial cells
C. digestive cells
D. nerve cell
Answer : B

39. "Portuguese Man of War" is the common name for
A. Aurelia
B. Metridium
C. Physalia
D. Tubipora
Answer : C

40. Polymorphism is best defined as the occurrence of
A. several types of organ-systems in an individual
B. different kinds of larval forms in the life history of an animal
C. different functions performed by a single kind of organism
D. several different types of individuals in a species
Answer : D

41. If a Hydra is cut into two pieces, it is noted that
A. both parts die
B. both parts make up the loss and form two new individuals
C. both parts live independently as they are
D. none of these
Answer : A

42. Nematocysts of Hydra are important for
A. cataching prey
B. paralysing prey
C. testing the food
D. testing the water
Answer : B

43. The first invertebrates to develop a true nervous system are
A. sponges
B. coelenterates
C. annelids
D. arthropods
Answer : B

44. The nematocysts which are mainly used for defense and offense and which tightly coil around the prey are
A. steptoline or atrichous
B. streptoline or holotrichous
C. volvent or desmonemes
D. penetrant or stenoteles
Answer : D

45. Division of labour on morphological basis is well exemplified by
A. Hydra
B. Obelia
C. Monkey
D. Elephant
Answer : B

46. Enteron is divided by mesentries in
A. Aurelia
B. Sea anemone
C. Obelia
D. Hydra
Answer : C

47. Hydra has no special structure for
A. attachment
B. respiration
C. food capturing
D. offense
Answer : B

48. Ctenophores differ form cnidorians in one important aspect, that is
A. absence of musculoepithelial cells in the body wall
B. absence of nematocysts
C. absence of sensory cells
D. absence of sexual reproduction
Answer : B

49. In Hydra, buds always arise at
A. the hypostome
B. the junction of hypostome and stomach
C. in junction of stomach and stalk
D. the stomach
Answer : C

50. Hydra is put under phylum coelentrata because it has
A. tentacles
B. cnidoblasts
C. hypostome
D. interstitial cells
Answer : B