Phylum - Coelentrata MCQ Solved Paper for NEET

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

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

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

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

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

6. The number of tentacles in Hydra is
A. 24
B. 610
C. 1040
D. 4050
Answer : B

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

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

9. 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

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

11. 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

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

13. 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

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

15. 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

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

17. 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

18. 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

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

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

21. Coelenteron in Hydra serves the purpose of
A. digestion and circulation
B. digestion and storage
C. excretion and digestion
D. circulation and storage
Answer : A

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

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

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

25. 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

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

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

28. 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

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

30. 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

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

32. 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

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

34. 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

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

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

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

38. 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

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

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

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

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

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

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

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

46. Hydra reproduces by gemmation (budding) when
A. Plenty of food is present
B. Pond dries up
C. Water becomes muddy
D. Hydra is alone
Answer : A

47. Nematocysts of Hydra are important for
A. cataching prey
B. paralysing prey
C. testing the food
D. testing the water
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. Green Hydra is
A. Hydra vulgaris
B. Chlorohydra viridisma
C. Hydra oligaetis
D. None of these
Answer : B

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