Phylum - Coelentrata MCQ Solved Paper for SSC JE

1. Digestion in Hydra is
A. intracellular
B. extracellular
C. first extracellular, then intracellular
D. first intracellular, then extracellular
Answer : C

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

3. 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

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

5. 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

6. 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

7. Polymorphism is found in
A. Hydra
B. Aleyonium
C. Aurelia
D. Physalia
Answer : D

8. 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

9. 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

10. 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

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

12. Brain coral is
A. Fungia
B. Hydra
C. Meandria
D. Tubipora
Answer : C

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

14. The mouth opens into a large single cavity in Hydra
A. coelom
B. enterocoel
C. pseudocoel
D. coelenteron
Answer : D

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

16. The scientific name of organ pipe coral is
A. Tubipora
B. Astrangia
C. Meandra
D. Aeropora
Answer : A

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

18. The larva of Hydra is known as
A. hydrula
B. planula
C. tadpole
D. amphiblastula
Answer : B

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

20. Most favourite food of Hydra is
A. bacteria
B. water fleas
C. tadpoles
D. fishes
Answer : B

21. 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

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

23. 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

24. 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

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

26. 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

27. 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

28. The mesoglea of Hydra contains
A. nerve cells
B. sensory cells
C. muscle fibres
D. no cells
Answer : D

29. Hydra prevents self fertilization by being
A. protogynous
B. hermaphrodite
C. monoecious
D. protandrous
Answer : D

30. 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

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

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

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

34. Communication between the enteron and exterior in coelentrates is through
A. mouth only
B. mouth and anus
C. large number of pores in the body wall
D. both (b) and (c)
Answer : A

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

36. 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

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

38. 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

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

40. A coelentrate, commonly known as fresh water polyp is
A. Hydra
B. Obelia
C. Physalia
D. Acerelia
Answer : A

41. 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

42. Cindom is a
A. battery of nematocysts
B. group of nematocysts
C. armed thread
D. none of these
Answer : B

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

44. Which of the following animals has a nervous system but no brain ?
A. Earthworm
B. Hydra
C. Amoeba
D. Cockroach
Answer : B

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

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

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

48. Nematocytes are the specialised cells found in the members of the phylum
A. porifera
B. coelentrata
C. annelida
D. platyhelminthes
Answer : B

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

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