Phylum - Coelentrata MCQ Solved Paper for IBPS Clerk

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

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

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

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

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

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

7. 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

8. 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

9. 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

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

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

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

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

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

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

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

17. 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

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

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

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

21. 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

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

23. The small green alga that lives inside Hydra is called
A. Zoochlorella
B. Chlamydomonas
C. Euglena
D. None of these
Answer : A

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

25. 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

26. Pueumatophore is present in
A. Tubularia
B. Obelia
C. Hydra
D. Physalia
Answer : D

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

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

29. Six septa or six mesenteries are characteristic of
A. Aurelia
B. Sea anemone
C. Obelia
D. Hydra
Answer : B

30. A piece of Hydra will regenerate into a full Hydra if it contains a part of
A. epidermis alone
B. gastrodermis alone
C. both (a) and (b)
D. (a), (b) and tentacles
Answer : A

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

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

33. 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

34. 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

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

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

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

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

39. Which one is found in Hydra
A. Metabolism
B. Metamerism
C. Melting
D. Metamorphosis
Answer : A

40. 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

41. 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

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

43. Ephyra is the larval form of
A. Sea anemone
B. Aurelia
C. Obelia
D. Hydra
Answer : B

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

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

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

47. 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

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

49. 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

50. 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