1. Shell in molluscs is
a) External
b) Internal
c) Any of the above
d) Shell is absent
Explanation: Any of the above
2. Unsegmented, triploblastic, eucoelomate is
a) Pheretima
b) Laccifer
c) Pila
d) All of these
Explanation: Pila
3. Select the incorrect matching:
a) Aurelia – Jelly fish
b) Sepia – Cuttle fish
c) Octopus – Devil fish
d) Loligo – Fighting fish
Explanation: "Loligo – Fighting fish". This is incorrect.
4. Select the incorrect matching:
a) Gorgonia – Sea fan
b) Adamsia – Sea anemone
c) Aplysia – Sea cucumber
d) Antedon – Sea lily
Explanation: "Aplysia – Sea cucumber". This is incorrect.
5. Pinctada is a
a) Sea hare
b) Cuttle fish
c) Pearl oyster
d) Apple snail
Explanation: Pinctada is a Pearl oyster.
6. The common name of which organism contains ‘sea’ in their name?
a) Chaetopleura
b) Dentalium
c) Sepia
d) Aplysia
Explanation: Aplysia
7. Animals having calcareous endoskeleton with organ-system level of organization, completely
marine are
a) Arthropoda
b) Mollusca
c) Hemichordates
d) Echinodermates
Explanation: Animals having calcareous endoskeleton with organ-system level of organization, completely marine are Echinodermates.
8. In which phylum, the larva is bilaterally symmetrical and the adult have radial symmetry?
a) Arthropoda
b) Mollusca
c) Hemichordata
d) Echinodermata
Explanation: Echinodermata
9. The most distinctive feature of echinoderm is
a) Gastro vascular cavity
b) Choanoctyes
c) Water vascular system/ambulacral system
d) Canal system
Explanation: Water vascular system/ambulacral system
10. Water vascular system helps in
a) Locomotion
b) Capture and transport of food
c) Respiration
d) All of these
Explanation: All of these