PHYLUM COELENTERATA
1. Hydra is..........
a) Acoelomate b) Pseudocoelomate c) Eucopelmoate d) None
2. The cavity of Hydra is
a) Haemocoel b) Hydrocoel c) Pseudocoelom d. Gastro- vascular cavity
3. Which one is found in Hydra
a) Metabolism b) Metamerism c) Mouling d) Metamorphosis
4. In Hydra, the Coelenteron serves for a) Locomotion and excretion b) Excretion and Circulation
c) Digestion and circulation d) Digestion and storage
5. The chief function of nematocysts in Hydra is
a) To paralyse its prey b) To test the quality of water
c) To capture its pray d) To test the quality of food
6. The small green plant that live inside the body of Hydra as a symbiont is
a) Volvox b) Chlamydomonas c) Englena d. Zoochorellae
7. The structure through which the mouth of Hydra opens is
a) Tentacle b) Oral hood c) Hypostome d) Basal disc
8 . Tentaculocysts in Obelia are meant for
a) Locomotion b) Balancing c) Swimming d) Reproduction
9. Penetrant, volvent and glutient are types of
a) Walking organs in Hydra b) Nematocysts in Hydra
c) Defensive organelles in Paramecium d) Parts of a leg of Cockroach
10. Body wall of Hydra is made up of
a) Ectoderm and endoderm b) Ectoerm, mesoderm, endoderm
c) Ectoderm, mesogloea, endoderm d) Mesoderm and endoderm
11 . Digestion in Hydra is a) Intra- Cellular b) Extra-cellular
c) First extra cellular and then intracellular d) First intra cellular, and then extra cellular
2. In Hydra, the ovary contains
a) Few ova b) Single ovum c) No ovum d) Many ova
13. The mesogloea of Hydra contains
a) Nerve cells b) Sensory Cells c) Muscle fibres d) No cells
14. One of the following mainly forms coral reef
a) Hydrozoans b) Schyphozoans c) Anthozoans d) None
15. Hydranth is
a) Polyp of Obelia b) Medusa of Obelia c) Blastostyle of Obelia d) None of the above
16. Poisonous fluid of nematocyst of Hydra is
a) Hipnoglobin b) Hypnotoxin c) Venom d) Hyalosecretion
17. Favorite food of Hydra is
a) Water flea b) Bacteria c) Fingerlings d) Nematode larvae
18. In Hydra one of the following is correct
a) One ovary and one testis b) Two Ovary and two testis
c) One ovary and many testis d) Many ovaries and single testis
19. Type of muscle in Hydra
a) Skeletal muscles b) Smooth muscles c) Both d) None
20. Planula is larva of a) Hydra b) Obelia c) Both d) None
21. Point out a non-parasitic
a) Sea Anemone b) Fresh Water leech c) Taenia solium d) Bed bug
22. In sea anemone, the symmetry is
a) Radial b) Spherical c) Bilateral d) Absent
23. Organ pipecoral is
a) Tubipora b) Physalia c) Helipora d) Astrea
24. Red Coral is a) Corallium b) Fungia c) Meandrina d) Tubipora
25. Mushroom coral is
a) Fungia b)Astrea c) Aurelia d) Pennatula

answer
1a 2 d 3 a 4c 5a 6 d 7 c 8 b 9 b 10 c 11 c 12 b 13 d 14 c 15 a 16 b 17 a 18 c 19 b 20 b21 a 22 a 23 a 24 a 25 a 26 a 27 c 28 a 29 a 30 b