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
11. Which of the following is true about reproduction in echinoderms?
a) Unisexuality
b) Usually external fertilization
c) Indirect development through free swimming larva
d) All of the above
Explanation: All of the above
12. Find out the number of spiny-bodied animals from the following:
Pila, Pinctada, Asterias, Echinus, Antedon, Cucumaria, Brittle star, Octopus
a) 4
b) 5
c) 6
d) 3
Explanation: 5
13. Select the correct matching:
a) Asterias – Sea urchin
b) Pila – Pearl oyster
c) Ophiura – Brittle star
d) Loligo – Cuttle fish
Explanation: "Ophiura – Brittle star". This is correct.
14. Select the incorrect matching:
a) Asterias – Star fish
b) Echinus – Sea urchin
c) Antedon – Sea lily
d) Cucumaria – Sea fan
Explanation: "Cucumaria – Sea fan". This is incorrect.
15. Sea urchin belongs to the class phylum
a) Echinodermata
b) Hemichordata
c) Ctenophora
d) Mollusca
Explanation: Echinodermata
16. Another name of cucummaria is
a) Sea urchin
b) Sea mouse
c) Sea pen
d) Sea cucumber
Explanation: Another name of cucummaria is Sea cucumber.
17. Which phylum shows regeneration in the lost part?
a) Mollusca
b) Annelida
c) Arthropoda
d) Echinodermata
Explanation: Echinodermata
18. Which phylum has the following features?
(1) Digestive track is complete, straight or U shape.
(2) Worm like, unsegmented marine animal.
(3) Respiration is done by gills.
(4) Excretion by single proboscis gland.
(5) Circulatory system is naturally open.
a) Arthropoda
b) Mollusca
c) Hemichordata
d) Urochordata
Explanation: Hemichordata
19. Which is a phylum?
a) Hemichordata
b) Urochordata
c) Cephalochordata
d) All of these
Explanation: Hemichordata is a phylum.
20. Larva of hemichordate is
a) Amphiblastula
b) Torneria
c) Ammocoete
d) Planula
Explanation: Larva of hemichordate is torneria.