MOLLLUSCA
1. Ospharadium is a
a. Pressoreceptor b. Chemoreceptor c. Rheoreceptor d. Phonoreceptor.
2.Veliger larva is an ectoparasite on-
a. Crab b.Fish c.Pila d. None
3.The mollusc which is commonly called as sea hare-
a. Rabbit b. Aphrodite c. Aplysia d.Pinctada
4. A pelagic gastropod is -
a. Chiton b. Doliolum c. Murex d. Pteropod
5. Pearls are produced by a. Poromya b. piinctada c. Pholas d. pila
6. In mollsca the respiratory pigment is-
a. Haemoglobin b. Heamocyanin c.Myoglobin d. Chloroorurin.
7. Oldest part of the shell of Unio is
a. Operculum b.Hinge c. Umbo d.Umbilicus.
8. Which mollusc is commonly known as giant squid?
a. Aplysia b. Architeuthis c. Arenicloa d. Archioris
9.Pearl oysters are destroyed by-
a. Ho1othurians b. Starfishes c.Gastropo d.Fishes.
10. The eye of one mollusc is compared to mat of a vertebrates
a. Pila b. Sepia c.Unio d. Chiton
11. The function of hectocotylized arm in Cephalopoda is
a. Defense b.Adhession c. Copulation d. Prehensile.
12.In unio the respiratory organs are
a. Ctenedia b.Book lungs c.Pulmonary sac d.Trachea.
13. The organ for eqillibrium in Pila is
a. Statocyst b.Ommatophore c. Osphradium d. Pseudepipodium.
14. Which of the following are a segmented mollusc?
a. Pila b. Ncopalina c.Devilfish d. Denitallium
15. Asymmetry is observed in
a. Pila b.Unio c.Holothuria d. Astrea.
16. Which of the animals have non-segmented body?
a.Tape worm b.Glow worm c. Ship worm d. Clam worm
17. The organ of Bojanus is meant for
a.Circulation b. Excretion c. Respiration d. Defense
18. The branch of science dealing with molluscan shell is
a. Onchology b. Conchology c. Odentilogy d. Calcology
19. The ‘spiny tongue’ of Pila is called
a. Petasma b. Radula c.Osphradium d. Nuchal lobe.
20. The adult slugs are without-
a. Shell b. Tentacles c. Muscular foot d. None of these.
21. The larval form of Unio is-
a. Glochidium b.Pluteus c.Tomaria d. Veliger
22. Kcbcr’s organ is associated with;
a.Ctenidium b.Stomach c. Liver d. Pericardium
23. Murex is
a. Boring mollusc b. Spiny xancus c. Pelagic mollusc d. Shell-less mollusc
24. A wood boring worm-
a. Patella b. Nereis c. Teredo d. Ancylostoma.
25. Which one are exclusively marine-mollusc?
a. Gastropods b. Pelecypods c. Cephalopods d. Scaphopods


1.b 2.d 3.c 4.d 5.b 6.b 7.c 8.b 9.b 10.b 11.c 12.a 13.a 14.b 15.a 16.c 17.b 18.b 19.b 20.a 21.a 22.d 23.b 24.c 25.c