Phylum - Coelentrata 1000+ MCQ with answer for RRB ALP

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

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

3. 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

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

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

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

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

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

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

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

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

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

13. Among coelenterates medusoid individuals are absent in members of the class
A. hydrozoa
B. scyphozoa
C. anthozoa
D. all the three
Answer : C

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

15. 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

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

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

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

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

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

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

22. 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

23. 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

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. 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

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

27. 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

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

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

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

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

32. 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

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

34. 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

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

36. 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

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

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

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

40. 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

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

42. Hydra is put under phylum coelentrata because it has
A. tentacles
B. cnidoblasts
C. hypostome
D. interstitial cells
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. The mouth opens into a large single cavity in Hydra
A. coelom
B. enterocoel
C. pseudocoel
D. coelenteron
Answer : D

45. 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

46. 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

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

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

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

50. 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